follow Dictionary.com

What is the X in X-mas?

sonic hedgehog

noun

the homologous gene or protein in some vertebrate species, mainly involved in controlling the size and shape of brain structures

Usage Note

medicine

Dictionary.com's 21st Century Lexicon
Copyright © 2003-2014 Dictionary.com, LLC
Cite This Source

Word of the Day

Word Value for sonic

7
9
Scrabble Words With Friends

Nearby words for sonic hedgehog