hydatid

noun

hy·​da·​tid ˈhī-də-təd 

-ˌtid

: the larval cyst of a tapeworm (genus Echinococcus) occurring as a fluid-filled sac containing daughter cysts in which scolices develop

Examples of hydatid in a Sentence

Recent Examples on the Web

Human echinococcosis, also known as hydatidosis or hydatid disease, is caused by the larval stages of the tapeworm. —Rebecca Kreston, Discover Magazine, 29 Apr. 2014

Word History

Etymology

Greek hydatid-, hydatis watery cyst, from hydat-, hydōr

First Known Use

1683, in the meaning defined above

Medical Definition

hydatid

noun

hy·​da·​tid ˈhīd-ə-təd, -ˌtid 

1

: the larval cyst of a tapeworm of the genus Echinococcus that usually occurs as a fluid-filled sac containing daughter cysts in which scolices develop but that occasionally forms a proliferating spongy mass which actively metastasizes in the host's tissues

called also hydatid cyst

see echinococcus sense 1

2

a

: an abnormal cyst or cystic structure

especially : hydatidiform mole

b

: hydatid disease