We found 26 dictionaries that define the word trilobite:

General (22 matching dictionaries)

1. trilobite: Longman Dictionary of Contemporary English
2. trilobite: Merriam-Webster
3. trilobite: Oxford Learner's Dictionaries
4. trilobite: American Heritage Dictionary of the English Language
5. trilobite: Collins English Dictionary
6. trilobite: Vocabulary.com
7. Trilobite, trilobite: Wordnik
8. trilobite: Cambridge Advanced Learner's Dictionary
9. trilobite: Wiktionary
10. trilobite: Webster's New World College Dictionary, 4th Ed.
11. trilobite: The Wordsmyth English Dictionary-Thesaurus
12. trilobite: Infoplease Dictionary
13. trilobite: Dictionary.com
14. trilobite: Online Etymology Dictionary
15. Trilobite (disambiguation), Trilobite: Wikipedia, the Free Encyclopedia
16. Trilobite: Online Plain Text English Dictionary
17. trilobite: Webster's Revised Unabridged, 1913 Edition
18. trilobite: Rhymezone
19. Trilobite: AllWords.com Multi-Lingual Dictionary
20. trilobite: FreeDictionary.org
21. trilobite: Mnemonic Dictionary
22. trilobite: TheFreeDictionary.com

Computing (1 matching dictionary)

23. trilobite: Encyclopedia

Medicine (1 matching dictionary)

24. online medical dictionary (No longer online)

Science (1 matching dictionary)

25. trilobite: Evolution Glossary

Slang (1 matching dictionary)

26. trilobite: Urban Dictionary

(Note: See trilobites as well.)

Definitions from Wiktionary (trilobite) ▸ noun:  An extinct arthropod of the class Trilobita, whose body had three large lobes. Similar: trilobozoan, trilobitomorph, trilobitologist, olenimorph, nontrilobite, trilophosaurid, anomocarid, agnostid, trilobitoide, odontopleurid, more... Opposite: unrelated, contemporary, modern, recent, current Adjectives: fossil, large, small, characteristic, cambrian, new, first, ordovician, common, perfect, ancient Colors:     gray,     brown,     black,     dark green,     rust, more... ▸ Word origin ▸ Words similar to trilobite ▸ Usage examples for trilobite ▸ Idioms related to trilobite ▸ Wikipedia articles (New!) ▸ Popular adjectives describing trilobite ▸ Words that often appear near trilobite ▸ Rhymes of trilobite ▸ Invented words related to trilobite