-ə̇s noun
Usage: capitalized
Etymology: New Latin, from Greek orthos straight; from the valves being hinged along a straight line
: a genus (the type of the family Orthidae) of articulate brachiopods abundant in the Paleozoic
-ə̇s noun
Usage: capitalized
Etymology: New Latin, from Greek orthos straight; from the valves being hinged along a straight line
: a genus (the type of the family Orthidae) of articulate brachiopods abundant in the Paleozoic
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012