allantoid

[uh-lan-toid]

adjective

Also al·lan·toi·dal [al-uh n-toid-l] /ˌæl ənˈtɔɪd l/. allantoic.

noun

the allantois.

Nearby words

  1. allantochorion,
  2. allantoic,
  3. allantoic sac,
  4. allantoic stalk,
  5. allantoic vesicle,
  6. allantoid membrane,
  7. allantoidoangiopagous twins,
  8. allantoin,
  9. allantoinuria,
  10. allantois

Origin of allantoid

1625–35; < Greek allantoeidḗs, equivalent to allant- (stem of allâs sausage) + -oeidḗs -oid

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for allantoid

allantoid

adjective

relating to or resembling the allantois
botany shaped like a sausage

noun

another name for allantois
Derived Formsallantoidal (ˌælənˈtɔɪdəl), adjective

Word Origin for allantoid

C17: from Greek allantoeidēs sausage-shaped, from allas sausage + -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

Medicine definitions for allantoid

allantoid

[ə-lăntoid′]

adj.

Of or having an allantois.
Shaped like a sausage.

n.

allantois

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.