from The American Heritage® Dictionary of the English Language, 4th Edition
- n. One member of a given litter of animal offspring.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An animal born in the same litter
from the GNU version of the Collaborative International Dictionary of English
- n. One of two or more animals born into the same litter.
litter + mate (Wiktionary)