<B>heliolatrous, </B>adjective.<DL COMPACT><DD> worshiping the sun. </DL>
<A NAME="heliolatry">
<B>heliolatry, </B>noun. =sun worship.</DL>
<A NAME="heliolithic">
<B>heliolithic, </B>adjective.<DL COMPACT><DD> of or having to do with a culture characterized by megaliths and sun worship. </DL>
<A NAME="heliology">
<B>heliology, </B>noun.<DL COMPACT><DD> the science of the sun. noun <B>heliologist.</B> </DL>
<A NAME="heliometer">
<B>heliometer, </B>noun.<DL COMPACT><DD> an astronomical instrument, originally for measuring the sun's diameter, but now used especially in determining the angular distance between two stars. </DL>
<A NAME="heliometric">
<B>heliometric, </B>adjective.<DL COMPACT><DD> having to do with a heliometer or heliometry. adv. <B>heliometrically.</B> </DL>
<A NAME="heliometry">
<B>heliometry, </B>noun.<DL COMPACT><DD> the technique of making measurements with the heliometer. </DL>
<A NAME="heliophile">
<B>heliophile, </B>noun.<DL COMPACT><DD> a heliophilous person or organism. </DL>
<A NAME="heliophilous">
<B>heliophilous, </B>adjective.<DL COMPACT><DD> attracted by sunlight; sun-loving. </DL>
<A NAME="heliopolar">
<B>heliopolar, </B>adjective.<DL COMPACT><DD> of or having to do with the pole or poles of the sun. </DL>
<A NAME="helios">
<B>Helios, </B>noun.<DL COMPACT><DD> (Greek Mythology.) the god of the sun, son of Hyperion. Helios is pictured driving a chariot drawn by four horses through the heavens. He was later identified with Apollo. The Romans called him Sol. </DL>
<A NAME="helioscope">
<B>helioscope, </B>noun.<DL COMPACT><DD><B> 1. </B>a device for looking at the sun without injury to the eye. <DD><B> 2. </B>a telescope having such a device. </DL>
<A NAME="helioseismology">
<B>helioseismology, </B>noun.<DL COMPACT><DD> the study of the waves in the sun's atmosphere. <BR> <I>Ex. The study of the waves, known as helioseismology, has revealed variations in temperature, density, and chemical composition in the sun's interior (Robert W. Noyes).</I> noun <B>helioseismologist.</B> </DL>
<A NAME="heliosphere">
<B>heliosphere, </B>noun.<DL COMPACT><DD> the region in space over which the sun's gases and magnetic field extend. </DL>
<A NAME="heliostat">
<B>heliostat, </B>noun.<DL COMPACT><DD> an apparatus consisting of a mirror turned by clockwork for reflecting the light of the sun in a fixed direction. </DL>
<A NAME="heliotactic">
<B>heliotactic, </B>adjective.<DL COMPACT><DD> having the property of heliotaxis. </DL>
<A NAME="heliotaxis">
<B>heliotaxis, </B>noun.<DL COMPACT><DD> (Biology.) movement in response to sunlight. </DL>
<A NAME="heliotrope">
<B>heliotrope, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> <B>1. </B>any one of a group of herbs or shrubs with clusters of small, sweet-smelling, purple or white flowers; turnsole. It belongs to the borage family. <DD><B> 2. </B>the common valerian. <DD><B> 3. </B>any plant whose flowers turn to follow the sun (formerly applied to the sunflower, marigold, and the like). <DD><B> 4. </B>a pinkish purple. <DD><B> 5. </B><B>=bloodstone.</B> <DD><B> 6. </B>(Surveying.) an instrument for reflecting the sun's rays to a distant point. <DD><I>adj. </I> pinkish-purple. </DL>
<A NAME="heliotropic">
<B>heliotropic, </B>adjective.<DL COMPACT><DD> (Botany.) turning or bending in response to sunlight. adv. <B>heliotropically.</B> </DL>
<A NAME="heliotropin">
<B>heliotropin, </B>noun. =piperonal.</DL>
<A NAME="heliotropism">
<B>heliotropism, </B>noun.<DL COMPACT><DD> the tendency of plants to turn toward sunlight. Heliotropism is a type of phototropism. </DL>
<A NAME="heliozoan">
<B>heliozoan, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> any one of a group of chiefly freshwater protozoans having a globular body with raylike pseudopods. <DD><I>adj. </I> of or belonging to the heliozoans. </DL>
<A NAME="heliozoic">
<B>heliozoic, </B>adjective. =heliozoan.</DL>
<A NAME="helipad">
<B>helipad, </B>noun.<DL COMPACT><DD> a small area for helicopters to take off or land on. </DL>
<A NAME="heliport">
<B>heliport, </B>noun.<DL COMPACT><DD> an airport for helicopters. Heliports may be built on the tops of buildings or in other small areas in large cities. </DL>
<A NAME="helispherical">
<B>helispherical, </B>adjective.<DL COMPACT><DD> winding spirally on a sphere. <BR> <I>Ex. a helispherical line.</I> </DL>
<A NAME="helium">
<B>helium, </B>noun.<DL COMPACT><DD> a very light, colorless, odorless gas that will not burn, much used in balloons and airships. Helium is an inert chemical element which occurs in small amounts in the air, in natural gas, in certain minerals, and as a product of many radioactive substances and processes. Helium, in the liquid state, is used as a refrigerant. It is also used in place of flammable gases in electric welding. </DL>
<A NAME="heliumspeech">
<B>helium speech,</B><DL COMPACT><DD> an unnatural, squeaky quality in the voice of undersea explorers or divers due to the higher frequency of sound in the helium gas contained in the pressurized mixture of gases breathed undersea. <BR> <I>Ex. There is an urgent requirement for speech converters to unscramble the extraordinary 'Donald Duck' noises of helium speech (Science Journal).</I> </DL>
<A NAME="helix">
<B>helix, </B>noun, pl. <B>helices,</B> <B>helixes.</B><DL COMPACT><DD><B> 1. </B>anything having a spiral, coiled form. A screw thread, a watch spring, or a snail shell is a helix. <DD><B> 2. </B>(Architecture.) <DD><B> a. </B>a spiral ornament. <DD><B> b. </B>a volute, especially one of the small ones just below the abacus of a Corinthian capital. <DD><B> 3. </B>(Anatomy.) the rim of the outer ear. <DD><B> 4. </B>(Geometry.) the curve traced by a straight line on a plane that is wrapped around a cylinder, like the thread of a screw. </DL>
<A NAME="helixin">
<B>helixin, </B>noun.<DL COMPACT><DD> an antibiotic derived from an actinomycete, used in the treatment of fungous diseases of plants. </DL>
<A NAME="hell">
<B>hell, </B>noun, interjection.<DL COMPACT><DD><I>noun </I> <B>1. </B>(in Christian and some other religious use) the place where wicked persons are punished after death; the abode of devils and damned spirits. <BR> <I>Ex. Hell is a city much like London--a populous and smoky city (Shelley).</I> <DD><B> 2. </B>the powers of evil. <BR> <I>Ex. The compact ... is an agreement with hell (William Lloyd Garrison).</I> <DD><B> 3. </B>the persons in hell. <BR> <I>Ex. All hell broke loose (Milton).</I> <DD><B> 4. </B>the home of the dead; the lower world regarded as a place of existence after death; Hades; Sheol. <BR> <I>Ex. She that had no need of me, Is a little lonely child Lost in Hell (Edna St. Vincent Millay).</I> (SYN) Avernus, Tartarus. <DD><B> 5. </B>(Figurative.) <DD><B> a. </B>any very bad or wicked place or condition, or one of torment or misery. <DD><B> b. </B>something very difficult or unpleasant. <BR> <I>Ex. The third part was hell, even though I won it (Atlantic).</I> <DD><B> c. </B>(Slang.) a scolding. <BR> <I>Ex. to get or catch hell.</I> <DD><B> 6. </B><B>=gambling house.</B> <DD><B> 7. </B>a place under a tailor's board, in which shreds or pieces of cloth are thrown. <DD><B> 8. </B>(Printing.) <B>=hellbox.</B> <DD><B> 9. </B>(Obsolete.) a part of a building, etc., which for its darkness or discomfort, or for a similar reason, was compared to hell. <DD><B> 10. </B>(Obsolete.) a place of confinement for debtors. <DD><I>interj. </I> a mild curse or exclamation of anger, annoyance, or surprise; heck. <BR><I>expr. <B>come hell or high water,</B> </I>no matter what might happen. <BR> <I>Ex. She allowed herself six weeks ... and announced that "come hell or high water" the deadline would be kept (London Times).</I> <BR><I>expr. <B>for the hell of it,</B> </I>(Slang.) for the pleasure derived from it; for kicks. <BR> <I>Ex. The guy who runs the gadget ... sent everything into motion just for the hell of it (Arthur Daley).</I> <BR><I>expr. <B>hell of a,</B> (Slang.) <DD><B> a. </B>very bad; rotten. </I> <I>Ex. Business is in one hell of a mess (John Tebbel).</I> <DD><B> b. </B>very good; exceptional. <BR> <I>Ex. His partner ... describes Watts as "one hell of a man" (Ian Adams).</I> <DD><B> c. </B>very; exceptionally. <BR> <I>Ex. What a hell of a quiet dog (Graham Greene).</I> <BR><I>expr. <B>play hell with,</B> </I>(Slang.) play havoc with; ruin. <BR> <I>Ex. A ten percent alteration in the specifications of a transistor will play hell with the circuit (Esquire).</I> <BR><I>expr. <B>raise hell,</B> </I>(Slang.) to make a disturbance; raise the devil. <BR> <I>Ex. Parents ... raise hell if their child is expected to study under miserable conditions (Brian Jackson).</I> <BR><I>expr. <B>to hell and gone,</B> </I>(Slang.) to an extreme distance or degree. <BR> <I>Ex. I'd lost a lot of weight while Dick and me were out on the road riding all to hell and gone (New Yorker).</I> </DL>
<B>Helladic, </B>adjective.<DL COMPACT><DD> of, from, or having to do with the ancient pre-Hellenic civilization in Greece from about 2500 to 1100 B.C.. <BR> <I>Ex. vases from the Helladic period.</I> </DL>
<A NAME="hellandite">
<B>hellandite, </B>noun.<DL COMPACT><DD> a mineral, a silicate of calcium and the rare earths, found in pegmatite veins. </DL>
<A NAME="hellbender">
<B>hellbender, </B>noun.<DL COMPACT><DD><B> 1. </B>a large salamander common especially in the Ohio River and its tributaries. <DD><B> 2. </B>(Slang.) a long and reckless debauch or drunken frolic. </DL>
<A NAME="hellbent">
<B>hellbent</B> or <B>hell-bent, </B>adjective, adverb.<DL COMPACT><DD> (Informal.) <DD><I>adj. </I> strongly bent (on); firmly determined. <BR> <I>Ex. Washington is hellbent on strangling industry with regulations (New Yorker).</I> <DD><I>adv. </I> resolutely; with no holds barred; recklessly. <BR> <I>Ex. driving his Ford pickup hellbent through the creek (Dan Cushman).</I> <BR><I>expr. <B>hellbent for leather.</B> </I>See under <B>leather.</B> </DL>
<A NAME="hellbox">
<B>hellbox, </B>noun.<DL COMPACT><DD> (Printing.) a waste box for damaged or broken type. </DL>
<A NAME="hellbroth">
<B>hellbroth, </B>noun.<DL COMPACT><DD> a magic broth prepared for an infernal purpose. </DL>
<A NAME="hellcat">
<B>hellcat, </B>noun.<DL COMPACT><DD><B> 1. </B>an evil, spiteful, or ill-tempered woman; vixen. <BR> <I>Ex. She went on in such a listless tone that I could no longer believe her reputation as a very hellcat of pugnacity (Maclean's).</I> <DD><B> 2. </B>a witch. </DL>
<A NAME="helldiver">
<B>hell-diver</B> or <B>helldiver, </B>noun.<DL COMPACT><DD> a small grebe, especially a pied-billed grebe. </DL>
