orthoceras

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noun

Any nautiloid cephalopod mollusc of the genus Orthoceras, known only as fossils

OriginAncient Greek κέρας →
Scrabble 15
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Meanings

nounorthoceras (plural orthocerata)

plural orthocerata

  1. Any nautiloid cephalopod mollusc of the genus Orthoceras, known only as fossils

Origin

  1. Ancient Greekκέρας“a horn”
  2. Englishorthoceras

From ortho- + Ancient Greek κέρας (kéras, “a horn”).

More words from Ancient Greek

Full word history & related roots →
Cite this entry
APA

orthoceras. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/orthoceras

MLA

“orthoceras.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/orthoceras. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “orthoceras,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/orthoceras.

Source: orthoceras on Wiktionary, CC BY-SA 4.0.