Associations to the word «Heterostracan»

Wiktionary

HETEROSTRACAN, noun. Any of the Heterostraci, an extinct class of jawless vertebrates that lived primarily in marine and estuary environments.

Dictionary definition

HETEROSTRACAN, noun. Extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian.

Wise words

However many holy words you read, however many you speak, what good will they do you if you do not act on upon them?
Buddha