one of a pair or group of animals born or reared in the same litter.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use littermate in a sentence
Meanwhile, 44 retriever puppies stayed with their moms and littermates until they were eight weeks old.Even raised by people, wolves don’t tune into you like your dog | Jaime Chambers | August 16, 2021 | Science News For Students
Instead, they spent most of their time with their fellow littermates and birth mother.Puppies beat out young wolves in one important skill | Monroe Hammond | July 26, 2021 | Popular-Science
Meanwhile, 44 retriever puppies stayed with their mothers and littermates until they were 8 weeks old, with only brief visits from people.Dogs tune into people in ways even human-raised wolves don’t | Jaime Chambers | July 12, 2021 | Science News
The average age was around eight and a half weeks, which is still in the middle of blissful puppydom—the age where they have primarily spent their time with their littermates and have had limited exposure to humans.