Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
No pronunciation record was provided for this word.
noun
Any of the armored jawless fishes of the Paleozoic.
Definition source: English Wiktionary via Wiktextract
Topics: biology, natural-sciences, zoology
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: jawless vertebrate, jawless fish, agnathan
History
From New Latin ostracum, from Ancient Greek ὄστρακον (óstrakon, “pottery fragment; shell”) + δέρμα (dérma, “skin”).
