- ophidianAny species of the suborder Serpentes; a snake or serpent.
- ophioliteAn assemblage of mafic and ultramafic rock fragments of the ocean lithosphere that has been tectonically moved onto a continental margin or island.
- hydrophidAny sea snake of the subfamily Hydrophiinae, venomous, preying on fishes, with a flattened tail for swimming.
- ophid-Of or pertaining to snakes
- ophidiariumA place for keeping snakes.
- ophio-Of or pertaining to snakes
- ophiolatrysnake worship
- ophiothricidAny in the family Ophiotrichidae of brittle stars.
- ophiureAny echinoderm of the class Ophiuroidea