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medulla 音标拼音: [mɪd'ʌlə] [mɪd'ulə] n. 骨髓,髓质,延髓 骨髓,髓质,延髓 medulla n 1: a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers [synonym: {myelin}, {myeline}, {medulla}] 2: lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata); "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning" [synonym: {medulla oblongata}, {medulla}, {bulb}] 3: the inner part of an organ or structure in plant or animal [ant: {cortex}] 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 oblongata. [1913 Webster] 3. (Bot.) A soft tissue, occupying the center of the stem or branch of a plant; pith. [1913 Webster] 4. See {medulla oblongata}. [PJC] {Medulla oblongata}. [L., oblong medulla] (Anat.), the posterior part of the brain connected with the spinal cord. It includes all the hindbrain except the cerebellum and pons, and from it a large part of the cranial nerves arise. It controls very largely respiration, circulation, swallowing, and other functions, and is the most vital part of the brain; -- called also {bulb of the spinal cord}. See {Brain}. [1913 Webster] Medulla, FL -- U.S. Census Designated Place in Florida Population (2000): 6637 Housing Units (2000): 2739 Land area (2000): 5.675822 sq. miles (14.700312 sq. km) Water area (2000): 0.017590 sq. miles (0.045557 sq. km) Total area (2000): 5.693412 sq. miles (14.745869 sq. km) FIPS code: 43925 Located within: Florida (FL), FIPS 12 Location: 27.962551 N, 81.980790 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Medulla, FL Medulla
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