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subumbrella

American

[suhb-uhm-brel-uh] / ˌsʌb ʌmˈbrɛl ə /

noun

Zoology.

the concave undersurface of a coelenterate medusa, as a jellyfish.

Other Word Forms

subumbrellar

adjective

Etymology

Origin of subumbrella

First recorded in 1875–80; sub- + umbrella

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.