Dictionary.com
Thesaurus.com

lambkin

American  
[lam-kin] / ˈlæm kɪn /

noun

  1. a little lamb.

  2. a person who is exceptionally sweet, young, and innocent, as a small child.

lambkin British  
/ ˈlæmkɪn /

noun

  1. a small or young lamb

  2. a term of affection for a small endearing child

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of lambkin

First recorded in 1570–80; lamb + -kin

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.