MED 



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MEL 



continuous with the spinal cord 

 within the skull resting on the 

 basilar process of the occipital 

 bone : m. ossium, os'-si-um (L. 

 05, a bone, ossium, of bones), 

 the marrow lodged in the interior 

 of the bones : m. spinalis, spin' 

 al'-is (L. splna, the backbone), 

 the spinal marrow or cord : med- 

 ullary rays, in bot., the rays of 

 cellular tissue seen in a transverse 

 section of exogenous wood, and 

 which connects the pith with 

 the bark : m. sheath, in bot. , 

 a thin layer of vascular tissue 

 which surrounds the pith in 

 exogenous stems : m. substance, 

 the interior white portion of the 

 brain or kidney : m. system, the 

 marrow bones, and the membranes 

 which enclose the marrow : med- 

 ullated, a., med-ul'-lat-$d, applied 

 to the nerve fibres which form 

 the white part of the brain, 

 spinal cord, and nerves. 



Medusa, n., med-uz'a, Medusae, 

 n. plu., med-uz'-e (L. Medusa, 

 in anc. mythology a beautiful 

 woman whose hair was turned into 

 snakes), an Order of Hydrozoa ; 

 sea animals, usually called sea- 

 blubber, sea-nettles, or jelly-fish, 

 whose usual form is that of a 

 hemisphere with a marginal 

 membrane and many trailing 

 feelers, so named from the sup- 

 posed resemblance of their 

 tentacles or feelers to the snaky 

 hair of Medusa: medusiforni, 

 a., m&d'Uz'-i-form (L. forma, 

 shape), resembling the medusae 

 in shape : medusoid, a., m&d- 

 uz'-oyd (Gr. eidos, resemblance), 

 like a medusa ; medusiform : n., 

 one of the medusiform gonophores 

 of the Hydrozoa. 



megaspores, n. plu., mZg'a-sporz 

 (Gr. megas, great ; spora, seed), 

 the larger kind of reproductive 

 spores found in Lycopods : meg- 

 asporangia, n., meg'-d-spor-dnf- 

 I'd, same as * macrosporangia. ' 



tnegatherms, n. plu., meg'-d* 



thermz(Gr. megas, great; therme, 

 heat), plants requiring a high 

 temperature ; also called ' mac- 

 rotherms. ' 



megistotherms, n. plu., mVdj-fat 

 to-thermz (Gr. megistos, very 

 great ; therme, heat), plants 

 requiring extreme or a very 

 high degree of heat. 



megrim, n., meg'-rim (F. mi- 

 graine, megrim; L. hemicranium, 

 half the skull), a neuralgic pain 

 confined to one side of the head ; 

 sick headache. 



Meibomian glands, ml-bom'-i-an 

 (first described by Meibom'ms), 

 glands situated upon the inner 

 surface of the eyelids, between 

 the tarsal cartilages and con- 

 junctiva, presenting the appear- 

 ance of parallel strings of pearls, 

 about thirty in the upper cartilage, 

 and somewhat fewer in the 

 lower. 



meiophylly, n., mi'-of-ll'-li (Gr. 

 'melon, less ; phullon, a leaf), in 

 bot., the suppression of one or 

 more leaves in a whorl. 



meiostemonous or miostemonous, 

 a., ml'-d-stem'-on-us (Gr. meion, 

 less ; stemon, a stamen), in bot., 

 a term applied to stamens less in 

 number than the parts of the 

 corolla. 



meiotaxy, n., ml'>o>talcs r -i (Gr. 

 meion, less ; taxis, arrangement), 

 in bot., the complete suppression 

 in a plant of a set of organs, as 

 the corolla or the stamens. 



melsena, n., mel-en'-a (Gr. melan, 

 black), the discharge of matter, 

 black like tar, from the bowels. 



Melaleuca, n., mel'-a-Uk'-d (Gr. 

 melan, black ; leukos, white), a 

 genus of greenhouse plants, Ord. 

 Myrtacese, producing splendid 

 flowers so named because the 

 trunk is black, and the branches 

 white : Melaleuca leucadendron, 

 I6k f 'a*dend'-ron (Gr. leukos, white; 

 dendron, a tree) ; M. cajuputi, 

 kadf'U-put'4 (Malay caju-puti, 

 white tree), species, particularly 



