va·​so·​to·​cin ˌvā-zə-ˈtō-sᵊn How to pronounce vasotocin (audio)
: a polypeptide pituitary hormone of most vertebrates below mammals that has properties similar to oxytocin and vasopressin

Example Sentences

Recent Examples on the Web In mammals, vasopressin and oxytocin play important roles in social behaviors, and reptiles have structurally similar hormones called vasotocin and mesotocin. Hannah Thomasy, New York Times, 24 Oct. 2022

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'vasotocin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


vaso- + (oxy)tocin

First Known Use

circa 1963, in the meaning defined above

Time Traveler
The first known use of vasotocin was circa 1963

Dictionary Entries Near vasotocin

Cite this Entry

“Vasotocin.” Dictionary, Merriam-Webster, Accessed 10 Dec. 2022.

Medical Definition


va·​so·​to·​cin ˌvā-zə-ˈtōs-ᵊn How to pronounce vasotocin (audio)
: a polypeptide pituitary hormone of most lower vertebrates that is held to have an antidiuretic function

More from Merriam-Webster on vasotocin

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