METACARPOPHALANGEAL 







\utranap-iov, wrist ; oa'/.a.) ;, phalanx]. Belonging 

 to the metacarpus and the phalanges. 

 Metacarpus {tnet-ak-ar' -pus) [//era , beyond ; icap-6g, 

 wrist]. The bones, five in number, of the palm of 

 the hand ; that part 

 between the carpus 

 and the phalanges. 

 Metacasein Reaction. 

 i The coagulation of 

 milk on boiling, after 

 treatment with pancre- 

 atic extracts. 

 Metacele, Metacelia 

 ' -as-el, met-as-e'- 

 ;) [//era, beyond; 

 a, cavity]. The 

 mdal or metencepha- 

 : portion of the fourth 

 mtricle. 



■tcellulose (met-as- 



-los) \jterd, along 



rith; cellula, & cell]. 



in isomer of cellulose, 



ith which it agrees 



being soluble in 



ancentrated sulphuric 



cid, and from which 



differs in being in- 



aluble in cupric am- 



Dnia even after the 



idition of acids. Cf. 



D aracellulose. 



letacheirisis (met-ak- 



i'-ris-is), Metacheir- 



ismus (inet-ak-i-riz' - 



\ptrd, with; X tl Pi 



hand]. Manipulation 



in the treatment of disease. 



Metachloral (met-ak-lo'-ral) [iierd, beyond ; x^ M Pog, 



green]. A tasteless, polymeric form of chloral, said 



to have properties not unlike those of chloral hydrate. 



Unof. 



Metachoresis (met-ak-c/ -res-is) [uera, beyond; x&pyGtc, 



a going]. Metastasis ; dislocation. 

 Metachromasia (met-ak-ro-ma' -ze-ah) \_ue~d, beyond ; 

 m, color] . The chemico-chromatic changes in- 

 duced in cells by the staining substances employed in 

 istologic technic. 



achromatism (met-ak-ro 1 '-mat-izm) \jierd, after ; 

 pCma, color]. Change of color, as of the hair. 

 Metachrosis {met-ak-ro 1 '-sis) [fierd, beyond ; xP^ £n \ 

 to tinge, to stain]. In biology, applied to the change 

 or play of colors seen in the squid, chameleon, and 

 other animals. 

 Metachysis (met-ak'-is-is) [perd, beyond; jwnc, effu- 

 sion]. The transfusion of blood. Also, the intro- 

 duction of any substance into the blood by mechan- 

 ical means. 

 Metacinesis (met-as-in-e' -sis). Synonym of A/eta kinesis. 

 Metacism (met' -as-izni) [in<raKiou6c, from pi, letter m]. 



Repetition of the letter m. 

 Metacondyle (met-ak-on' '-dll) [uera, after; kov6v7oc, 

 knuckle]. Any distal phalanx of a finger, or the bone 

 thereof. 

 • letacone (met f -ak-on) [nerd, beyond; Kuvog, cone]. 



The outer posterior cusp of an upper molar tooth, 

 -fletaconid (met-ak-o'-nid) \jtird, beyond ; K<jvog, 

 cone] . The inner anterior cusp of a lower molar tooth. 

 Metaconule (met-ak-o , -nfd) [pera, beyond; kuvoc, 

 cone]. The posterior intermediate cusp of an upper 

 molar tooth. 



753 



METALLIC 



Bones of the Hand, Showing 

 the Metacarpus. 



i. Scaphoid. 2. Semilunar. 3 

 Cuneiform. 4. Pisiform. 5 

 Trapezium. 6. Groove for ten 

 don of flexor carpi radialis. 7 

 Trapezoid. 8. Os magnum. 

 Unciform, io, 10. Metacarpal 

 bones. 11, n. First phalanges 

 of fingers. 12,12. Second pha- 

 langes. 13, 13. Third pha- 

 langes. 14. First phalanx of 

 thumb. 15. Second phalanx. 



au 



Ml 

 P 



Metacrolein (niet-ak-ro / -le-in) [uerd, beyond; acer, 

 sharp ; oleum, oil], (C 3 H 4 0) 3 . A product of the 

 burning of the HC1 compound of acrolein with alka- 

 lies or potassium carbonate. It crystallizes from 

 alcohol in tablets, fusing at from 45 to 46 C, and 

 dissociating at 160 C. 



Metacyesis (met-as-i-e'-sis) \jierd, beyond; Kvrjaig, 

 gestation]. Extra-uterine gestation, especially that 

 which is begun in the oviduct and continued in the 

 abdominal cavity. 



Metadermatosis {met-ad-er-mat-o / -sis) \jurd, beyond ; 

 fiipua, skin ; voGoq, disease]. A pathologic produc- 

 tion of epidermis. 



Metadrasis (met-ad-ra' '-sis) [perd, over; dpdeig, exer- 

 tion]. Overwork of body or mind. 



Metafacial (met - af- a' '- ska/) \jierd, beyond ; fades, 

 face]. Posterior to the face. 



Metagaster (nut-ag-as'-ter) [uerd, beyond ; yaarijp, 

 stomach]. The primitive digestive tube from which 

 the respiratory organs are developed. 



Metagastrula (met-ag-as'-tru-lak) {jierd, beyond; 

 yacrrijp, belly]. A modification of segmentation, pro- 

 ducing a form of gastrula differing from the simple 

 gastrula of the amphioxus. 



Metagenesis (niet-aj*en'-es-is) \jitrd, beyond, after; 

 yheciq, production]. In biology, indirect develop- 

 ment, or the alternation of differently-formed genera- 

 tions which multiply in different ways, /. e. , sexually 

 or gemmiparously. 



Metagenetic, Metagenic (met-aj-en-ef -ik, met-aj-en'- 

 ik) \jizrd, beyond; yiveaig, origin]. Relating to 

 metagenesis. 



Metaglycerin (met-ag-lis' '-er-in) [perd, beyond ; ;/i- 

 Kepog, sweet], C 6 H 12 4 . An oily substance derived 

 from glycerin by heating a solution of it in water to 

 ioo° C. or by treating glycerin with hydrochloric acid. 



Metagnathism (met-ag , -na-thizm) \jierd, beyond; 

 y-vdfhc, the jaw]. In biology, applied to the crossing 

 of the mandibles, as seen in certain birds, e.g., Loxia 

 curvirostra. 



Metakinesis (tnet-ak-in-e / -sis) \_perd, toward ; nivrjaig, 

 movement, change]. 1. In biology, Waldeyer's term 

 for the pithode, or barrel-stage of cell-division, in 

 which the secondary threads or loops tend to pass 

 toward the two poles of the nuclear spindle. 2. Any 

 psychologic exhibition coordinate or correlate of 

 kinesis. See Kinesis. 



Metakresol (met-ak-re / -sol) \jierd, along with; nptac, 

 flesh ; oleum, oil], C 7 H 8 2 . A phenol isomeric with 

 kresol. It boils at 201 C. (398.8 F.) and has an 

 odor like that of carbolic acid. 



Metal (mel'-al) [pha/./jov, a metal]. Any elementary 

 substance distinguished by malleability, ductility, 

 fusibility, and the basic character of its oxid. 



Metalbumin (met-al'-bu-min). See Paralbumin. 



Metalepsy (met'-al-ep-se) [perd7.r]ibig , participation]. 

 In chemistry, change or variation produced by the 

 displacement of an element or radicle in a compound 

 by its chemic equivalent. It is the same as Substi- 

 tution, q. v. 



Metaleptic (tnet-al-ep / -tik) [perd/.r/rbic, participation]. 

 Relating to metalepsy ; also applied to a muscle, asso- 

 ciated in its movement with another. 



Metallage, Metallaxis (met'-al-dj, met-al-aks'-is). 

 Synonym of Metabasis, 0. v. 



Metallenterophthisis (met-al-en-ter-ojP '-this-is) [pira/.- 

 ~/ov, metal; h-repov, intestine; <pdiaig, wasting]. In- 

 testinal wasting or phthisis caused by metallic poison- 

 ing. 



Metallic (met-al' -ik) [uera/./.ov, metal]. Resembling a 

 metal. M. Base for Artificial Teeth, a metallic 

 plate adapted to such portion of the alveolar arch as 





