APTYCHUS


Meaning of APTYCHUS in English

ˈaptə̇kəs noun

( plural apty·chi -ˌkī)

Etymology: New Latin, from a- (II) + Greek ptychē fold — more at ptych-

: a shelly plate usually of two pieces found in ammonites and regarded as an operculum

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.