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noun Pathology.
  1. a small, yellowish amino-acid and peptide-secreting tumor usually found in the gastrointestinal tract and lung.

Origin of carcinoid

First recorded in 1925–30; carcin(o)- + -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
carcinoid in Medicine


  1. A small, slow-growing, benign or malignant tumor, usually in the gastrointestinal tract, that is composed of islands of rounded cells with small vesicular nuclei and secretes serotonin.argentaffinoma
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.