setae Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. stiff hairs or bristles found on animals or plants. Example Sentence The caterpillar's body was covered in setae, giving it a fuzzy appearance. More Example Sentences Setae can be found on many insects. Synonyms bristles; hairs; spines Antonyms smooth; hairless Hear It! Say It! Write It! setae Switch to cursive Start Share with your friends: