• synonyms


See more synonyms for adenoid on Thesaurus.com
  1. Usually adenoids. an enlarged mass of lymphoid tissue in the upper pharynx, often obstructing breathing through the nasal passages.
Show More
  1. of or relating to the lymph glands.
  2. of or relating to the adenoids.
Show More

Origin of adenoid

From the Greek word adenoeidḗs, dating back to 1830–40. See aden-, -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

snout, beak, muzzle, snoot, proboscis, bill, nares, nostrils, adenoids, schnoz, snuffer, horn, sniffer, smeller

Examples from the Web for adenoid

Historical Examples

  • A similar difficulty is experienced by children with adenoid growths.

    The Sounds of Spoken English

    Walter Rippmann

  • The tissue combining them is known as adenoid or gland-like tissue.

    A Practical Physiology

    Albert F. Blaisdell

  • This cushion is formed of what doctors call "adenoid tissue" and is similar to that which makes up the tonsils.

  • When this adenoid tissue grows abnormally large it forms what are known as "adenoids."

  • A section through the nose and mouth: A, adenoid growth; P, soft palate; T, right tonsil.

    A Handbook of Health

    Woods Hutchinson

British Dictionary definitions for adenoid


  1. of or resembling a gland
  2. of or relating to lymphoid tissue, as that found in the lymph nodes, spleen, tonsils, etc
  3. of or relating to the adenoids
Show More

Word Origin

C19: from Greek adenoeidēs. See adeno-, -oid
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 adenoid


1839, "gland-like," medical Latin adenoideus, from Greek adenoeides, from aden (genitive adenos) "gland" (see inguinal) + eidos "form" (see -oid). Adenoids "adenoid growths" attested by 1862.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

adenoid in Medicine


  1. A lymphoid tissue growth located at the back of the nose in the upper part of the throat that when swollen may obstruct normal breathing and make speech difficult.
  2. adenoids Hypertrophy of the pharyngeal tonsil resulting from chronic inflammation.
Show More
  1. Of, relating to, or resembling lymphatic glands or lymphatic tissue.
Show More
Related formsad′e•noidal (ăd′n-oidl) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.