MES- 



187 



MET- 



mesas, middle ; L. venter, belly.] 

 In the middle ventral region. 

 Mesozoic (mes'ozo'ik) n. [Gk. mesos, 

 middle ; zoe, life.] The middle or 

 secondary group of rock-systems 



metabiosis (met'ablo'sis) n. [Gk. 

 me/a, after ; bios, life.] Condition 

 in which one organism lives only 

 after another has prepared its 

 environment and died (biol.}. 



metabolic (mgt'abol'ik) a. [Gk. meta, 

 after ; ballein, to throw.] Change- 

 able ; appl. chemical changes 

 occurring in living organism ; 

 metamorphosing (biol.\ 



metabolln (metab'olin) n. [Gk. meta- 

 bole, change.] A product of meta- 

 bolism (phys.}. 



metabolism (metab'ollzm) n. [Gk. 

 metabole, change.] The chemical 

 change, constructive and destruc- 

 tive, occurring in living organisms 

 (biol.). 



metabranchial (mgt'abrang^kTal) a. 

 [Gk. meta, after ; brangchia, gills.] 

 Pert, or in the region of the 

 posterior gill region (zoo/.). 



metacarpal (mgt'akar'pal) a. [Gk. 

 meta, after ; L. carpus, the wrist.] 

 Pert, the metacarpus ; appl. bones, 

 articulations, etc. (anat.~). 



metacarpophalangeal (mgt'akar'po- 

 falan'jeal) a. [Gk. meta, after; 

 L. carpus, wrist ; Gk. phalanx, 

 series.] Appl. the articulations be- 

 tween metacarpals and phalanges 

 (anat.). 



metacarpus (mgt'akar'pus) n. [Gk. 

 meta, after ; L. carpus, wrist.] 

 The skeletal part of the hand 

 between wrist and fingers, con- 

 sisting of five cylindrical bones 

 (anat.). 



metachromatinic grains, chroma- 

 toid bodies found in cells very 

 similar to chromatin in properties 

 and characteristics (cyt.). 



metachrosis (met'akro'sis) n. [Gk. 

 meta, after ; chrosis, colouring.] 

 Ability to change colour by expan- 

 sion of pigment cells, as in some 

 Fishes and Reptiles (zoo/.). 



metacneme (meYaknem) n. [Gk. 

 meta, after ; kneme, the tibia.] A 

 secondary mesentery of Zoantharia 

 (tool.). 



metacoel (mgt'asel) n. [Gk. meta, 

 after ; koilos, hollow.] The third 

 and posterior part of the coelom 

 of Molluscs (zoo/.). 



metacone (met'akon) n. [Gk. meta, 

 after ; konos, cone.] The postero- 

 external cusp of an upper molar 

 (tool.) 



metaconid (met'ako'nid) n. [Gk. meta, 

 after ; konos, cone ; eidos, resem- 

 blance.] The postero-internal cusp 

 of a lower molar (zoo/.). 



metaconule (meYako'nul) n. [Gk. 

 meta, after ; konos, cone.] The 

 posterior secondary cusp of an 

 upper molar (zoo/.). 



metacoracoid (met'akSr'akoid) n. 

 [Gk. meta, after ; korax, crow ; 

 eidos, resemblance.] The posterior 

 part of the coracoid (zoo/.). 



metacromion (mSt'akro'mlon) n. [Gk. 

 meta, after ; akros, summit ; omos, 

 shoulder.] A posterior branch- 

 process of the acromion-process of 

 the scapular spine (zoo/.). 



metadiscoidal (mgt'adiskoid'al) a. 

 [Gk. meta, after ; diskos, a quoit ; 

 eidos, resemblance.] Appl. placenta 

 in which thevilli are at first scattered 

 and later restricted to a disc, as in 

 man and monkey (zoo/.). 



metadromous (mgtad'romus) a. [Gk. 

 meta, after ; dromos, a running.] 

 With primary veins of a segment 

 arising from the upper side of the 

 midrib (bot.). 



metaesthetism (metgs'thgtlzm) n. 

 [Gk. meta, after ; aisthetos, per- 

 ceptible by the senses.] The 

 doctrine that " consciousness is a 

 product of the evolution of matter 

 and force." 



metagastric (met'agas'trlk) a. [Gk. 

 meta, after ; gaster, belly.] Pert. 

 the posterior gastric region (zoo/.). 



metagastrula (m&t'agas'troola) n. 

 [Gk. meta, after ; gaster, belly.] A 

 modified form of gastrula (zoo/.). 



metagenesis (mgt'ajen'gsis) n. [Gk. 

 meta, after ; genesis, descent.] Al- 

 ternation of generations, which see. 



metakinesis (met'Skine'sIs) n. [Gk. 

 meta, after ; kinein, to move.] The 

 middle stage of mitosis, during which 

 the chromosomes are grouped in 

 the equatorial plate (cyt.}. 



metaloph (met'alof) n. [Gk. meta, 



