subumbrella

[ suhb-uhm-brel-uh ]
/ ˌsʌb ʌmˈbrɛl ə /

noun Zoology.

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

Origin of subumbrella

First recorded in 1875–80; sub- + umbrella

OTHER WORDS FROM subumbrella

sub·um·brel·lar, adjective