Bulb of the spinal cord

Bulb of the spinal cord
Bulb Bulb (b[u^]lb), n. [L. bulbus, Gr. bolbo`s: cf. F. bulbe.] 1. (Bot.) A spheroidal body growing from a plant either above or below the ground (usually below), which is strictly a bud, consisting of a cluster of partially developed leaves, and producing, as it grows, a stem above, and roots below, as in the onion, tulip, etc. It differs from a corm in not being solid. [1913 Webster]

2. (Anat.) A name given to some parts that resemble in shape certain bulbous roots; as, the bulb of the aorta. [1913 Webster]

{Bulb of the eye}, the eyeball.

{Bulb of a hair}, the ``root,'' or part whence the hair originates.

{Bulb of the spinal cord}, the medulla oblongata, often called simply bulb.

{Bulb of a tooth}, the vascular and nervous papilla contained in the cavity of the tooth. [1913 Webster]

3. An expansion or protuberance on a stem or tube, as the bulb of a thermometer, which may be of any form, as spherical, cylindrical, curved, etc. --Tomlinson. [1913 Webster]

3. a {light bulb}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • bulb of the spinal cord — Medulla Me*dul la, n. [L.] 1. Marrow; pith; hence, essence. [Obs.] Milton. [1913 Webster] 2. (Anat.) The marrow of bones; the deep or inner portion of an organ or part; as, the medulla, or medullary substance, of the kidney; specifically, the… …   The Collaborative International Dictionary of English

  • Bulb of the eye — Bulb Bulb (b[u^]lb), n. [L. bulbus, Gr. bolbo s: cf. F. bulbe.] 1. (Bot.) A spheroidal body growing from a plant either above or below the ground (usually below), which is strictly a bud, consisting of a cluster of partially developed leaves, and …   The Collaborative International Dictionary of English

  • Bulb — (b[u^]lb), n. [L. bulbus, Gr. bolbo s: cf. F. bulbe.] 1. (Bot.) A spheroidal body growing from a plant either above or below the ground (usually below), which is strictly a bud, consisting of a cluster of partially developed leaves, and producing …   The Collaborative International Dictionary of English

  • Bulb of a hair — Bulb Bulb (b[u^]lb), n. [L. bulbus, Gr. bolbo s: cf. F. bulbe.] 1. (Bot.) A spheroidal body growing from a plant either above or below the ground (usually below), which is strictly a bud, consisting of a cluster of partially developed leaves, and …   The Collaborative International Dictionary of English

  • Bulb of a tooth — Bulb Bulb (b[u^]lb), n. [L. bulbus, Gr. bolbo s: cf. F. bulbe.] 1. (Bot.) A spheroidal body growing from a plant either above or below the ground (usually below), which is strictly a bud, consisting of a cluster of partially developed leaves, and …   The Collaborative International Dictionary of English

  • bulb — /bʌlb / (say bulb) noun 1. Botany a. a storage organ, usually subterranean, having fleshy leaves and a stem reduced to a flat disc which roots from the underside, as in the onion, lily, etc. b. a plant growing from a bulb. 2. any round, enlarged… …  

  • List of regions in the human brain — Anatomical regions of the brain are listed vertically, following hierarchies that are standard in neuroanatomy. Functional, connective and developmental regions are listed horizontally in parentheses where appropriate.Functional and connective… …   Wikipedia

  • Medulla — Me*dul la, n. [L.] 1. Marrow; pith; hence, essence. [Obs.] Milton. [1913 Webster] 2. (Anat.) The marrow of bones; the deep or inner portion of an organ or part; as, the medulla, or medullary substance, of the kidney; specifically, the medula… …   The Collaborative International Dictionary of English

  • Medulla oblongata — Medulla Me*dul la, n. [L.] 1. Marrow; pith; hence, essence. [Obs.] Milton. [1913 Webster] 2. (Anat.) The marrow of bones; the deep or inner portion of an organ or part; as, the medulla, or medullary substance, of the kidney; specifically, the… …   The Collaborative International Dictionary of English

  • Bulbar — Bulb ar, a. Of or pertaining to bulb; especially, in medicine, pertaining to the bulb of the spinal cord, or medulla oblongata; as, bulbar paralysis. [1913 Webster] …   The Collaborative International Dictionary of English

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