The Collaborative International Dictionary
Orthoceratite
Orthoceratite \Or`tho*cer"a*tite\, n. [Ortho- + Gr. ?, ?, a horn.] (Zo["o]l.) An orthoceras; also, any fossil shell allied to Orthoceras.
Wiktionary
orthoceratite
n. 1 An orthoceras. 2 Any fossil shell allied to Orthoceras.