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metatarsal (meYatar'sal) a. [Gk. 

 meta, after ; L. tarsus, the ankle.] 

 In the region of the tarsus ; appl. 

 arteries, veins, etc. ; pert, the meta- 

 tarsal bones (zool., anat.}. 



metatarsophalangeal (me't'atar'so- 

 falan'jeal) a. [Gk. me fa, after ; L. 

 tarsus, ankle ; Gk. phalanx, troop.] 

 Appl. articulations between the 

 metatarsus and phalanges of the 

 foot (anat.}. 



metatarsus (met'atar'sus) n. [Gk. 

 meta, after ; L. tarsus, ankle.] The 

 part of the foot between the ankle 

 and toes (anat.}. 



rnetathalamus (met'atharamus) n. 

 [Gk meta, after; thalamos, chamber.] 

 The geniculate bodies of the brain 

 (anat.}. 



metathorax (met'atho'raks) n. [Gk. 

 meta, after ; thorax, the chest.] The 

 posterior segment of the thorax 

 of Insects (zool.}. 



metatrophic (meYatrof'ik) a. [Gk. 

 meta, after ; trofihe, nourishment.] 

 Living on decaying organic matter 

 (bot.}. 



metaxylem (mSt'azi'lem) n. [Gk. 

 meta, after ; nylon, wood.] Second- 

 ary xylem with thick walled cells 

 (t>ot.}. 



metazoaea (mgt'azo'ea) n. [Gk. meta, 

 after ; zoe, life.] A larval stage of 

 Crustacea between zoaea and mega- 

 lopa stages (zool.}. 



metazoon (mSt'azo'on) n. [Gk. meta, 

 after ; zoon, animal.] A multicellu- 

 lar animal (zool.}. 



metencephalon (met'enkef'alon, -sef-) 

 n. [Gk. meta, after ; en, in ; kephale, 

 head.] The hind-brain or cere- 

 bellum. 



metenteron (meten'teron) n. [Gk. 

 meta, after ; enteron, gut.] An 

 intermesenteric chamber of a sea- 

 anemone or other Coelenterate 

 (zopl.}. 



metepimeron (mSt'e'pim'gron) n. [Gk. 

 meta, after ; epi, upon ; meros, part.] 

 The epimeron of an insect meta- 

 thorax (zool.}. 



metepisternum (met'e'pisteVnum) n. 

 [Gk. meta, after ; epi, upon ; sternon, 

 breast-bone.] The episternum of 

 an insect metathorax (zool}. 



methaemoglobin (mgthe'moglo'bm) ;/. 

 [Gk. meta, after ; haiina, blood ; L. 



globus, a globe.] A product of 

 blood decomposition (phys.}. 



metochy (met'oki) n. [Gk. metoche, 

 a sharing.] The relationship be- 

 tween a neutral guest insect and its 

 host (zool.}. 



metoecious (mSte'shus) a. [Gk. meta, 

 after ; oikos, a house.] Metoxenous 

 or heteroecious (dot.}. 



metope (meYope) n. [Gk. metopon, 

 forehead.] The middle frontal 

 portion of a Crustacean (zool.}. 



metopic (metop'ik) a. [Gk. metopon, 

 forehead.] Pert, the forehead ; 

 appl. the frontal suture (anat.}. 



metosteon (mStos'teon) n. [Gk. meta, 

 after ; osteon, bone.] A posterior 

 sternal ossification in birds (zool.}. 



metovum (meto'vum) n. [Gk. meta, 

 after ; L. ovum, an egg.] An egg- 

 cell surroundedbynutritive material 

 (cyt.}. 



metoxenous (metok'sgnus) a. [Gk. 

 meta, after ; xenos, a guest.] Para- 

 sitic on different hosts at different 

 stages in life-history (dot.}. 



micella (miseTa) n. [L. dim. of mica, 

 morsel.] An ultimate supra-mole- 

 cular unit of a cell. See hypo- 

 thetical units. 



micraesthetes (mlkres'thets) n. plu. 

 [Gk. mikros, small ; aesthetikos, per- 

 ceptive.] The smaller sensory 

 organs of Placophora (zool.}. 



microbe (mi'krpb) n. [Gk. mikros, 

 small ; bios, life.] A bacterium ; a 

 micro-organism. 



microbiology (ml'kroblpl'oj!) n. [Gk. 

 mikros, small ; bios, life ; logos, dis- 

 course.] Bacteriology. 



microcalthrops (ml'krokal'throps) n. 

 [Gk. mikros, small ; A.S. coltraeppe, 

 a kind of thistle.] A primitive 

 tetraxon, or euaster with four 

 persistent rays (zool.}. 



microcentrum (mi'krosen'trum) . 

 [Gk. mikros, small ; L. centrum, 

 centre.] The dynamic centre of 

 a cell composed of centrosomes 

 (cyt.}. 



microconjugant (ini'krdkon'joogant) //. 

 [Gk. mikros, small ; L. conjugare, 

 to unite.] A motile ciliated free- 

 swimming conjugant or gamete 

 which attaches itself to a macro- 

 conjugant and fertilizes it (zool.}. 



microconidium (mi'krbkonid'ium) n. 



