MEG- 



180 



MEM- 



of heterosporous plants, regarded 

 as female ; the embryo sac-cell of 

 a seed plant (bot.}. 



megasporophyll (meg'aspo'rofil) n. 

 [Gk. megas, great ; sporos, seed ; 

 phyllon, leaf.] A spore-bearing leaf 

 developing megasporangia (bot.}. 



megatherm (meg'atherm) n. [Gk. 

 megas, great ; therme, heat.] A 

 tropical plant (bot.}. 



megazooid (meg'azo'oid) n. [Gk. 

 megas, great ; zoon, animal ; eidos, 

 like.] The larger zooid resulting 

 from binary or other fission (zool.}. 



megazoospore (meg'azo'ospor) n. [Gk. 

 megas, great ; zoon, animal ; sporos, 

 seed.] A large zoosppre, as in the 

 reproduction of certain Radiolaria 

 (zool.') ; a zoogonidium of certain 

 Algae (bot.}. 



Meibomian glands, glands of the 

 eyelid with a sebaceous secretion 

 (anat.}. 



meiophylly (ml'ofil'I) n. [Gk. melon, 

 smaller ; phyllon, leaf.] The sup- 

 pression of one or more leaves in 

 a whorl (bot.}. 



meiostemonous (ml'ostem'onus) a. 

 [Gk. melon, smaller ; stemon, a spun 

 thread.] Having fewer stamens 

 than petals or sepals (hot.}. 



meiotaxy (ml'otak'si) n. [Gk. melon, 

 smaller ; taxis, arrangement.] Sup- 

 pression of a whorl or a set of 

 organs (bot.}. 



meiotic (mlot'fk) a. [Gk. melon, 

 smaller.] Appl. reduction division, 

 which see ; also maiotic (cyt.}. 



Meissner's plexus, a gangliated 

 plexus of nerve fibres in the sub- 

 mucous coat of the small intestine 

 (j>hys.\ 



melanin (mel'anln) n. [Gk. melas, 

 black.] Black or dark-brown pig- 

 ment, as of the retina ; cf. haemo- 

 zoin (phys.}. 



melanism (mel'anTzm) n. [Gk. me/as, 

 black.] Excessive development of 

 black pigment in skin or body- 

 covering (biol.}. 



melanocyte (mel'anosit) n. [Gk. melas, 

 black; kytos, hollow.] A black 

 pigmented lymphocyte (phys.}. 



melanospermous (ineTandsper'iniis) a. 

 [Gk. melas, black ; sperma, seed.] 

 Appl. seaweeds with dark-coloured 

 spores (bot.}. 



melanotlc (meTanot'ik) a. [Gk. melas, 

 black.] Having black pigment un- 

 usually developed. 



melliferous (melif'erus) a. [L. mel, 

 honey ; ferre, to carry.] Honey- 

 producing (bot.}. 



melliphagous (melif'agus) a. [L. mel, 

 honey ; Gk.phagein, to eat.] Feed- 

 ing on honey (zool.}. 



mellisugent (mel'Isu'jent) a. [L. mel, 

 honey ; sugere, to suck.] Honey- 

 sucking (zool.}. 



mellivorous (meliv'orus) a. [L. mel, 

 honey ; vorare, to devour.] Feeding 

 on honey (zool.}. 



member (mem'ber) n. [L. membrum, 

 a member.] A limb or organ of 

 the body (zool.} ; a well-defined 

 part or organ of a plant (bot.}. 



membrana (membra'na) n. [L. mem- 

 brana, a membrane.] A thin film, 

 skin or layer of tissue covering a 

 part or organ of animal or plant ; 

 or a thin skin-like covering of 

 cells or unicellular organisms 

 (biol.}. 



membranaceous (mem'brana'shus) a. 

 [L. membrana, membrane.] Of the 

 consistency or having the structure 

 of a membrane (biol.}. 



membrane (mem'bran), a mem- 

 brana, which see. 



membrane bone, a bone developing 

 directly from membrane without 

 passing through a cartilage stage 

 (anat.}. 



membranella (mem'branel'a) n. [L. 

 membrana, membrane.] A flapping 

 or swinging membrane formed by 

 fusion of rows of cilia, found among 

 the Protozoa (zool.}. 



membraniferous (mem'branif'erus) a. 

 [L. membrana, membrane ; ferre, 

 to carry.] Enveloped in or bear- 

 ing a membrane. 



membranoid (mem'branoid) a. [L. 

 membrana, membrane ; Gk. eidos, 

 like.] Resembling membrane. 



membranous (mem'branus) a. [L. 

 membrana, membrane.] Resem- 

 bling or consisting of membrane ; 

 pliable and semitransparent. 



membranous cranium, a mesenchy- 

 mal investment enclosing the whole 

 brain (emb.}. 



membranous labyrinth, the internal 

 ear, separated from the bony cavi- 



