hydrotheca

[ hahy-druh-thee-kuh ]

noun

, Zoology.

, plural hy·dro·the·cae [hahy-dr, uh, -, thee, -kee].

1. the part of the perisarc covering a hydranth.

Other Words From

• hydro·thecal adjective

Word History and Origins

Origin of hydrotheca¹

From New Latin, dating back to 1870–75; hydro- ¹, theca