<B>ocellated, </B>adjective.<DL COMPACT><DD><B> 1. </B>having ocelli or eyelike spots. <DD><B> 2. </B>eyelike. <BR> <I>Ex. ocellated spots or markings.</I> </DL>
<A NAME="ocellation">
<B>ocellation, </B>noun.<DL COMPACT><DD> an eyelike spot or marking. </DL>
<A NAME="ocellus">
<B>ocellus, </B>noun, pl. <B>ocelli.</B><DL COMPACT><DD><B> 1. </B>a little eye; one of the rudimentary, single-lens eyes found in certain invertebrates, especially one of the simple eyes, usually three in number, situated between the compound eyes of insects. <BR> <I>Ex. Ocelli ... may function in increasing the irritability of the organism to light (Harbaugh and Goodrich).</I> <DD><B> 2. </B>an eyelike spot or marking. There are ocelli on peacock feathers and certain butterfly wings. </DL>
<A NAME="ocelot">
<B>ocelot, </B>noun.<DL COMPACT><DD> a spotted and streaked wildcat somewhat like a leopard, but smaller, found from Texas south through Mexico and into parts of South America. <BR> <I>Ex. The ocelot, ... a nocturnal cat, lives in forests and thick vegetation [and] makes his meals off small mammals and birds (Science News Letter).</I> </DL>
<A NAME="och">
<B>och, </B>interjection.<DL COMPACT><DD> (Irish and Scottish.) an exclamation of surprise, regret, sorrow, or other emotion. </DL>
<A NAME="ocher">
<B>ocher, </B>noun, adjective, verb.<DL COMPACT><DD><I>noun </I> <B>1. </B>any one of various earthy mixtures containing clay and iron oxide, ranging in coloring from pale yellow to orange, brown, and red, used as pigments. <DD><B> 2. </B>a pale brownish yellow. <DD><B> 3. </B>(Slang.) money. <DD><I>adj. </I> pale brownish-yellow. <DD><I>v.t. </I> to color or mark with ocher. Also, <B>ochre.</B> </DL>
<B>ochlocracy, </B>noun, pl. <B>-cies.</B><DL COMPACT><DD> government by the mob; mob rule. <BR> <I>Ex. The commonest of the old charges against democracy was that it passed into ochlocracy (James Bryce).</I> </DL>
<A NAME="ochlocrat">
<B>ochlocrat, </B>noun.<DL COMPACT><DD> an advocate of ochlocracy. </DL>
<A NAME="ochlocratic">
<B>ochlocratic, </B>adjective.<DL COMPACT><DD> of, having to do with, or having the form of ochlocracy. adv. <B>ochlocratically.</B> </DL>
<B>ochroid, </B>adjective.<DL COMPACT><DD> like ocher in color; brownish-yellow. </DL>
<A NAME="ock">
<B>-ock,</B><DL COMPACT><DD> (suffix.) diminutive, as in <I>dunnock, hillock.</I> </DL>
<A NAME="ocker">
<B>Ocker</B> or <B>ocker, </B>noun.<DL COMPACT><DD> (Australian Slang.) a type of boorish, self-righteous, and often bigoted Australian man. </DL>
<A NAME="ockhamsrazor">
<B>Ockham's Razor, =Occam's Razor.</B></DL>
<A NAME="oclock">
<B>o'clock,</B><DL COMPACT><DD><B> 1. </B>of the clock; by the clock. <BR> <I>Ex. What o'clock is it? It is one o'clock.</I> <DD><B> 2. </B>as if on the dial of a clock. 12 o'clock in an airplane is the horizontal direction straight ahead, or the vertical position straight overhead. </DL>
<A NAME="ocotillo">
<B>ocotillo, </B>noun, pl. <B>-los.</B><DL COMPACT><DD> a spiny, scarlet-flowered shrub, a candlewood, growing in the southwestern United States and in Mexico. When the plants are not blooming, they look like dead sticks. </DL>
<A NAME="ocr">
<B>OCR</B> (no periods),<DL COMPACT><DD> optical character recognition (the ability of a computer unit to recognize printed characters or words and convert them into computer code without keyboard operation). </DL>
<A NAME="ocrea">
<B>ocrea, </B>noun, pl. <B>ocreae.</B><DL COMPACT><DD><B> 1. </B>a tubular stipule or stipules sheathing the stem above the node, as in buckwheat. <DD><B> 2. </B>a similar part or growth on an animal, as on the legs of some birds. Also, <B>ochrea.</B> </DL>
<A NAME="ocreate">
<B>ocreate, </B>adjective.<DL COMPACT><DD> having an ocrea or ocreae; sheathed. </DL>
<A NAME="ocs">
<B>OCS</B> (no periods),<DL COMPACT><DD> (U.S.) Officer Candidate School. </DL>
<A NAME="oct">
<B>oct-,</B><DL COMPACT><DD> (combining form.) the form of <B>octo-,</B> or <B>octa-,</B> before vowels, as in <I>octane.</I> </DL>
<A NAME="oct">
<B>oct.,</B><DL COMPACT><DD> octavo. </DL>
<A NAME="oct">
<B>Oct.,</B><DL COMPACT><DD> October. </DL>
<A NAME="octa">
<B>octa-,</B><DL COMPACT><DD> (combining form.) a variant of <B>octo-,</B> as in <I>octachord.</I> </DL>
<A NAME="octachord">
<B>octachord, </B>noun.<DL COMPACT><DD> (Music.) <DD><B> 1. </B>an instrument having eight strings. <DD><B> 2. </B>a diatonic series of eight notes or tones. </DL>
<A NAME="octachordal">
<B>octachordal, </B>adjective.<DL COMPACT><DD> of the octachord. </DL>
<A NAME="octad">
<B>octad, </B>noun.<DL COMPACT><DD><B> 1. </B>a group or series of eight. <DD><B> 2. </B>(Chemistry.) an element, atom, or radical with a valence of eight. </DL>
<A NAME="octadic">
<B>octadic, </B>adjective.<DL COMPACT><DD> of or having to do with an octad. </DL>
<A NAME="octagon">
<B>octagon, </B>noun.<DL COMPACT><DD> a plane figure having eight angles and eight sides. </DL>
<A NAME="octagonal">
<B>octagonal, </B>adjective.<DL COMPACT><DD> having eight angles and eight sides. adv. <B>octagonally.</B> </DL>
<A NAME="octahedral">
<B>octahedral, </B>adjective.<DL COMPACT><DD><B> 1. </B>having eight plane faces. <DD><B> 2. </B>of or like an octahedron. <BR> <I>Ex. The direction ... at right angles to an octahedral plane is called an octahedral direction (Science News).</I> adv. <B>octahedrally.</B> </DL>
<A NAME="octahedrite">
<B>octahedrite, </B>noun.<DL COMPACT><DD> a mineral, titanium dioxide, commonly occurring in octahedral crystals. </DL>
<A NAME="octahedron">
<B>octahedron, </B>noun, pl. <B>-drons,</B> <B>-dra.</B><DL COMPACT><DD> a solid figure having eight plane faces or sides. </DL>
<A NAME="octal">
<B>octal, </B>adjective.<DL COMPACT><DD> of, having to do with, or based upon the number eight, as a numbering system based upon units of eight. </DL>
<A NAME="octamerism">
<B>octamerism, </B>noun.<DL COMPACT><DD><B> 1. </B>the state of being octamerous. <DD><B> 2. </B>(Humorous.) the state of being in eight parts. </DL>
<A NAME="octamerous">
<B>octamerous, </B>adjective.<DL COMPACT><DD><B> 1. </B>(of an animal) having eight radiating parts or organs. <DD><B> 2. </B>(of a flower) having eight members in each whorl. </DL>
<A NAME="octameter">
<B>octameter, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> a line of poetry having eight feet or measures. <DD><I>adj. </I> consisting of eight feet or measures. </DL>
<A NAME="octane">
<B>octane, </B>noun.<DL COMPACT><DD> a colorless, liquid hydrocarbon that occurs in petroleum and belongs to the methane series. High quality gasoline contains more octane than lower grades. </DL>
<A NAME="octanenumber">
<B>octane number</B> or <B>rating,</B><DL COMPACT><DD> a number indicating the quality of a motor fuel, based on its antiknock properties. The higher the compression ratio of an engine, the higher the octane number of its fuel to have satisfactory performance. </DL>
<B>octangular, </B>adjective.<DL COMPACT><DD> having eight sides; octagonal. </DL>
<A NAME="octans">
<B>Octans, </B>noun, genitive <B>Octantis.</B><DL COMPACT><DD> a southern constellation near the south celestial pole. </DL>
<A NAME="octant">
<B>octant, </B>noun.<DL COMPACT><DD><B> 1. </B>one eighth of a circle; a 45-degree angle or arc. <DD><B> 2. </B>one of the eight parts into which a space is divided by three planes intersecting at one point. <DD><B> 3a. </B>an instrument having an arc of 45 degrees, used in navigation to measure the altitude of heavenly bodies in order to determine latitude and longitude. <DD><B> b. </B>an aircraft sextant by which angles up to 90 degrees may be measured against an artificial horizon of the bubble type. <DD><B> 4. </B>(Astronomy.) the position of a planet, the moon, or other heavenly body when 45 degrees distant from another. </DL>
<A NAME="octantis">
<B>Octantis, </B>noun.<DL COMPACT><DD> genitive of <B>Octans.</B> </DL>
<A NAME="octapeptide">
<B>octapeptide, </B>noun.<DL COMPACT><DD> a polypeptide chain made up of eight amino acids. <BR> <I>Ex. All the known actions of renin, including the principal ones of raising the arterial blood pressure ... are mediated through the octapeptide angiotension (New Scientist).</I> </DL>
<A NAME="octaphonic">
<B>octaphonic, </B>adjective.<DL COMPACT><DD> of or having to do with high-fidelity sound transmission or reproduction over eight different channels. </DL>
<A NAME="octarchy">
<B>octarchy, </B>noun, pl. <B>-chies.</B><DL COMPACT><DD><B> 1. </B>government by eight persons. <DD><B> 2. </B>a group of eight states, each under its own ruler. </DL>
<A NAME="octaval">
<B>octaval, </B>adjective.<DL COMPACT><DD> of or having to do with an octave or series of eight; octal. </DL>
<A NAME="octavalent">
<B>octavalent, </B>adjective.<DL COMPACT><DD> (Chemistry.) having a valence of eight. </DL>
<A NAME="octave">
<B>octave, </B>noun, adjective.<DL COMPACT><DD><I>noun </I> <B>1. </B>the interval between a musical tone and another tone having twice or half as many vibrations. From middle C to the C above it is an octave. <DD><B> 2. </B>an eighth note above or below a given tone, having twice or half as many vibrations per second. <DD><B> 3. </B>the series of tones, or of keys of an instrument, filling the interval between a tone and its octave. <DD><B> 4. </B>the sounding together of a tone and its octave. <DD><B> 5. </B>a group of eight. <DD><B> 6. </B>a group of eight lines of poetry. <DD><B> 7. </B>the first eight lines of a sonnet. <DD><B> 8. </B>a church festival and the week after it. <DD><B> 9. </B>the last day of such a week. <DD><B> 10. </B>the eighth in a series of eight parries in fencing. <DD><I>adj. </I> <B>1. </B>consisting of eight (of anything). <DD><B> 2. </B>producing notes one octave higher. <BR> <I>Ex. an octave flute (piccolo), the octave stop of an organ.</I> </DL>