<B>microgamete, </B>noun.<DL COMPACT><DD> the smaller, typically the male, of two gametes of an organism that reproduces by the union of unlike gametes. </DL>
<A NAME="microgauss">
<B>microgauss, </B>noun.<DL COMPACT><DD> one millionth of a gauss. <BR> <I>Ex. The earth's magnetic field is about one microgauss near the magnetic poles (Scientific American).</I> </DL>
<A NAME="microgram">
<B>microgram, </B>noun.<DL COMPACT><DD> a unit of mass equal to one millionth of a gram. </DL>
<B>micrograph, </B>noun.<DL COMPACT><DD><B> 1. </B>a photograph, drawing, or other representation of an object as seen through a microscope. <BR> <I>Ex. Other micrographs are described as showing the effects of multiple dislocations on the growth of the crystals (Science News).</I> <DD><B> 2. </B>an instrument that produces very small writing or engraving. <DD><B> 3. </B>a device that measures and records extremely small movements by means of the corresponding movements of a diaphragm. </DL>
<A NAME="micrographic">
<B>micrographic, </B>adjective.<DL COMPACT><DD><B> 1. </B>having to do with the description of microscopic objects. <DD><B> 2. </B>of or having to do with the writing of very small characters; minutely written. </DL>
<A NAME="micrography">
<B>micrography, </B>noun.<DL COMPACT><DD><B> 1. </B>the description of microscopic objects. <DD><B> 2. </B>examination or study with the microscope. <DD><B> 3. </B>the art of writing in very small letters. </DL>
<A NAME="microgravity">
<B>microgravity, </B>noun.<DL COMPACT><DD> a condition of very low gravity, especially approaching weightlessness. <BR> <I>Ex. In the past, some astronauts had a hard time getting used to microgravity and were nauseated for their first few days in orbit (The Space Shuttle Operator's Manual).</I> </DL>
<A NAME="microgroove">
<B>microgroove, </B>noun.<DL COMPACT><DD> a very narrow groove used on phonograph records, especially records designed for playing speeds of 45, 33 1/3, or 16 revolutions per minute, typically requiring the use of a needle measuring 1/1000 of an inch in width at the tip. </DL>
<B>microhardness, </B>noun.<DL COMPACT><DD> the degree of hardness of a metal, determined by measuring a very small indenture made on its surface. </DL>
<A NAME="microhm">
<B>microhm, </B>noun.<DL COMPACT><DD> one millionth of an ohm. </DL>
<A NAME="microimage">
<B>microimage, </B>noun.<DL COMPACT><DD> an image or reproduction made by microphotography. <BR> <I>Ex. The Bible was reproduced by what ... the company's head of research calls photochromic microimages (Time).</I> </DL>
<A NAME="microinch">
<B>microinch, </B>noun.<DL COMPACT><DD> a unit of linear measure equal to one millionth of an inch. </DL>
<A NAME="microinjection">
<B>microinjection, </B>noun.<DL COMPACT><DD> injection of substances into microscopic bodies by using a micropipette. <BR> <I>Ex. Biologists can manipulate cells, introduce chemicals by microinjection (Scientific American).</I> </DL>
<A NAME="microinsemination">
<B>microinsemination, </B>noun.<DL COMPACT><DD> a technique for external fertilization in which a single sperm is injected directly into an egg cell. <BR> <I>Ex. Customers could opt for a standard ... in vitro fertilization ... or newer techniques like microinsemination, which has proved successful in ... helping sperm penetrate the egg (A. L. Cowan).</I> </DL>
<A NAME="microinstruction">
<B>microinstruction, </B>noun.<DL COMPACT><DD> a single brief instruction to a computer, such as "add" or "delete." </DL>
<A NAME="microlens">
<B>microlens, </B>noun.<DL COMPACT><DD> a lens for photography on a microscopic scale. <BR> <I>Ex. [He] used microlenses and extreme slow motion to get awesome footage of mayflies living out their brief lives (Time).</I> </DL>
<A NAME="microlepidopteron">
<B>microlepidopteron, </B>noun, pl. <B>-tera.</B><DL COMPACT><DD> a small lepidopterous insect, such as the clothes moth. </DL>
<A NAME="microliter">
<B>microliter, </B>noun.<DL COMPACT><DD> one millionth of a liter. </DL>
<A NAME="microlith">
<B>microlith, </B>noun.<DL COMPACT><DD> a tiny, pointed blade or chip of stone, usually flint, such as those used on arrows and tools during periods of the Stone Age. </DL>
<A NAME="microlithic">
<B>microlithic, </B>adjective.<DL COMPACT><DD> of, having to do with, or characterized by the use of microliths. </DL>
<B>micrological, </B>adjective.<DL COMPACT><DD> characterized by minuteness of investigation or discussion. </DL>
<A NAME="micrology">
<B>micrology, </B>noun.<DL COMPACT><DD> the discussion or investigation of trivial things or petty affairs; hairsplitting. </DL>
<A NAME="micromachine">
<B>micromachine, </B>noun.<DL COMPACT><DD> a device made of extremely small parts. <BR> <I>Ex. Another possibility is to build somewhat bigger micromachines, ones that are perhaps 20 times the width of a human hair (World Book Science Year).</I> </DL>
<A NAME="micromachining">
<B>micromachining, </B>noun.<DL COMPACT><DD> the machining of very small parts, such as the components of microcircuits. </DL>
<A NAME="micromanipulation">
<B>micromanipulation, </B>noun.<DL COMPACT><DD> the technique of performing delicate operations on microscopic bodies and structures such as cells, subcellular structures, crystals, and fibers. </DL>
<A NAME="micromanipulator">
<B>micromanipulator, </B>noun.<DL COMPACT><DD> a device or instrument used in micromanipulation to move tiny needles, scalpels, and other tools. The operations are performed under a microscope. </DL>
<A NAME="micromap">
<B>micromap, </B>transitive verb, <B>-mapped,</B> <B>-mapping.</B><DL COMPACT><DD> to map microscopic parts or details of. <BR> <I>Ex. This effect makes it possible to locate--or micromap--the distribution of uranium and thorium in different samples (Robert M. Walker).</I> </DL>
<A NAME="micrometeor">
<B>micrometeor, </B>noun. =micrometeorite.</DL>
<A NAME="micrometeoric">
<B>micrometeoric, </B>adjective.<DL COMPACT><DD> of or having to do with micrometeorites. <BR> <I>Ex. micrometeoric dust.</I> </DL>
<A NAME="micrometeorite">
<B>micrometeorite, </B>noun.<DL COMPACT><DD> a tiny particle of meteoritic dust, so small that it does not burn as it falls to earth from outer space. Micrometeorites range from a few microns to about 100 microns in diameter. The impact of micrometeorites on the surface of space vehicles is the subject of much research by space scientists. <BR> <I>Ex. The metallized fabric balloons are susceptible to puncturing by micrometeorites (New Scientist).</I> </DL>
<B>micrometeorology, </B>noun.<DL COMPACT><DD> the branch of meteorology that deals with the 'atmospheric phenomena of very small areas. </DL>
<A NAME="micrometer">
<B>micrometer</B> (1), noun.<DL COMPACT><DD><B> 1. </B>an instrument for measuring very small distances, angles, and objects. Certain kinds are used with a microscope or telescope. <DD><B> 2. </B><B>=micrometer caliper.</B> <DD><B> 3. </B><B>=micrometer screw.</B> </DL>
<A NAME="micrometer">
<B>micrometer</B> (2), noun.<DL COMPACT><DD> one millionth of a meter; micron. </DL>
<A NAME="micrometercaliper">
<B>micrometer caliper,</B><DL COMPACT><DD> a caliper having a screw with a very fine thread, used for very accurate measurement, such as in working on or with machine tools or in watchmaking. </DL>
<A NAME="micrometerscrew">
<B>micrometer screw,</B><DL COMPACT><DD> a screw with very fine, precisely cut threads and a head graduated so that the distance traveled by the screw from its base setting may be exactly ascertained. Measurements in units as small as 1/10,000 of an inch can be made with a micrometer screw. </DL>
<A NAME="micrometric">
<B>micrometric, </B>adjective.<DL COMPACT><DD> of, having to do with, or made with the micrometer. <BR> <I>Ex. (Figurative.) a micrometric crispness of control.</I> adv. <B>micrometrically.</B> </DL>
<B>microminiature, </B>adjective.<DL COMPACT><DD> smaller than miniature; extremely small. </DL>
<A NAME="microminiaturization">
<B>microminiaturization, </B>noun.<DL COMPACT><DD> the process of developing and producing microminiature electronic circuits or similar devices. </DL>
<A NAME="microminiaturize">
<B>microminiaturize, </B>transitive verb, <B>-ized,</B> <B>-izing.</B><DL COMPACT><DD> to reduce (electronic circuits or similar devices) to a size smaller than miniature. <BR> <I>Ex. The transistorized lock ... could be microminiaturized and adapted to any number of combinations (New York Times).</I> </DL>
<A NAME="micromodule">
<B>micromodule, </B>noun.<DL COMPACT><DD> a small chip or wafer of insulation material, usually ceramic, in which an element of a microminiature electronic circuit has been deposited. </DL>
<A NAME="micromole">
<B>micromole, </B>noun.<DL COMPACT><DD> (Chemistry.) one millionth of a gram molecule. <BR> <I>Ex. Enzyme activity is expressed in micromoles of substrate metabolized per hour per gram (Science).</I> </DL>
<A NAME="micromorphological">
<B>micromorphological, </B>adjective.<DL COMPACT><DD> of or having to do with micromorphology. </DL>
<A NAME="micromorphology">
<B>micromorphology, </B>noun.<DL COMPACT><DD> the morphology of microscopic structures or bodies. <BR> <I>Ex. studies in the micromorphology of soil.</I> </DL>
<A NAME="micromotion">
<B>micromotion, </B>noun.<DL COMPACT><DD> an exceedingly short (in duration or length) motion or series of motions. </DL>
