hydatid

noun

hy·​da·​tid ˈhī-də-təd How to pronounce hydatid (audio)
-ˌtid
: the larval cyst of a tapeworm (genus Echinococcus) occurring as a fluid-filled sac containing daughter cysts in which scolices develop

Word History

Etymology

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

First Known Use

1683, in the meaning defined above

Time Traveler
The first known use of hydatid was in 1683

Dictionary Entries Near hydatid

Cite this Entry

“Hydatid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydatid. Accessed 28 Nov. 2022.

Medical Definition

hydatid

noun

hy·​da·​tid ˈhīd-ə-təd, -ˌtid How to pronounce hydatid (audio)
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
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