Dictionary.com
Thesaurus.com

feti-

American  
especially before a vowel, fet-,

  1. a combining form representing fetus or fetal in compound words.

    fetoscope.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.