hy·​da·​tid | \ ˈhī-də-təd How to pronounce hydatid (audio) , -ˌtid \

Definition of hydatid

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

First Known Use of hydatid

1683, in the meaning defined above

History and Etymology for hydatid

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

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The first known use of hydatid was in 1683

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Cite this Entry

“Hydatid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydatid. Accessed 20 Sep. 2020.

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

Medical Definition of hydatid

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
2a : an abnormal cyst or cystic structure especially : hydatidiform mole

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