Definition of Ampyx
: a genus of small blind Ordovician trilobites with a long spine at the anterior end of the head
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Origin and Etymology of ampyx
New Latin, from Greek, woman's diadem, probably from am- (from ana-) + -pyx (akin to Greek pykazein to cover closely, surround, crown); akin to Avestan pusā- diadem
First Known Use: 1843
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