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noun, plural me·dul·las, me·dul·lae [muh-duhl-ee] /məˈdʌl i/.
  1. Anatomy.
    1. the marrow of the bones.
    2. the soft, marrowlike center of an organ, as the kidney or adrenal gland.
    3. medulla oblongata.
  2. Botany. the pith of plants.
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Origin of medulla

1635–45; < Latin: marrow, pith
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for medulla

vigor, heart, substance, embodiment, meat, gist, importance, essence, soul, crux, fiber, nucleus, significance, strength, force, marrow, pulp, center, medulla, corey

Examples from the Web for medulla

Historical Examples of medulla

British Dictionary definitions for medulla


noun plural -las or -lae (-liː)
  1. anatomy
    1. the innermost part of an organ or structure
    2. short for medulla oblongata
  2. botany another name for pith (def. 4)
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Derived Formsmedullary or medullar, adjective

Word Origin for medulla

C17: from Latin: marrow, pith, probably from medius middle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for medulla


hindmost segment of the brain, 1650s, from Latin medulla, literally "marrow," also "pith of plants," of unknown origin, perhaps related to or influenced by medius "middle" (but cf. also Old Irish smiur, Welsh mer "marrow"). The word was used in the Latin senses in Middle English. Related: Medular; medullary.

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Online Etymology Dictionary, © 2010 Douglas Harper

medulla in Medicine


n. pl. me•dul•las
  1. The inner core of certain organs or body structures, such as the marrow of bone.medullary substance
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Related formsme•dullar null adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

medulla in Science


[mĭ-dŭlə, mĭ-dōōlə]
Plural medullas medullae (mĭ-dŭlē)
  1. See medulla oblongata.
  2. The central portion of an anatomical structure, such as the adrenal gland or the kidney.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.