medullary sheath
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Medullary sheath — Sheath Sheath, n. [OE. schethe, AS. sc[=ae][eth], sce[ a][eth], sc[=e][eth]; akin to OS. sk[=e][eth]ia, D. scheede, G. scheide, OHG. sceida, Sw. skida, Dan. skede, Icel. skei[eth]ir, pl., and to E. shed, v.t., originally meaning, to separate, to… … The Collaborative International Dictionary of English
Medullary sheath — Medullary Med ul*la*ry, a. [L. medullaris, fr. medulla marrow: cf. F. m[ e]dullaire.] 1. (Anat.) (a) Pertaining to, consisting of, or resembling, marrow or medulla. (b) Pertaining to the medula oblongata. [1913 Webster] 2. (Bot.) Filled with… … The Collaborative International Dictionary of English
medullary sheath — n. 1. Anat. a layer of myelin forming a sheath around certain nerve fibers 2. Bot. a ring of primary xylem around the pith of some stems … English World dictionary
medullary sheath — noun a layer of myelin encasing (and insulating) the axons of medullated nerve fibers • Syn: ↑myelin sheath • Hypernyms: ↑sheath, ↑case • Part Holonyms: ↑medullated nerve fiber, ↑ … Useful english dictionary
medullary sheath — med′ullary sheath′ n. 1) bot a narrow zone made up of the innermost layer of woody tissue immediately surrounding the pith in plants 2) anat. myelin sheath • Etymology: 1840–50 … From formal English to slang
medullary sheath — noun Date: circa 1846 myelin sheath … New Collegiate Dictionary
medullary sheath — 1. Bot. a narrow zone made up of the innermost layer of woody tissue immediately surrounding the pith in plants. 2. Anat. See myelin sheath. [1840 50] * * * … Universalium
medullary sheath — /məˈdʌləri ʃiθ/ (say muh duluhree sheeth) noun 1. a narrow zone made up of the innermost layer of woody tissue immediately surrounding the pith in plants. 2. → myelin …
Sheath — Sheath, n. [OE. schethe, AS. sc[=ae][eth], sce[ a][eth], sc[=e][eth]; akin to OS. sk[=e][eth]ia, D. scheede, G. scheide, OHG. sceida, Sw. skida, Dan. skede, Icel. skei[eth]ir, pl., and to E. shed, v.t., originally meaning, to separate, to part.… … The Collaborative International Dictionary of English
Sheath knife — Sheath Sheath, n. [OE. schethe, AS. sc[=ae][eth], sce[ a][eth], sc[=e][eth]; akin to OS. sk[=e][eth]ia, D. scheede, G. scheide, OHG. sceida, Sw. skida, Dan. skede, Icel. skei[eth]ir, pl., and to E. shed, v.t., originally meaning, to separate, to… … The Collaborative International Dictionary of English
