Definition of acalyculate in English:

acalyculate

Pronunciation /eɪkəˈlɪkjʊlət/

adjective

rare Zoology
  • Of a hemipenis of a snake or lizard: lacking calyces (sculptured surface features with a central depression).

Origin

Late 19th century (in an earlier sense). From a- + classical Latin calyculus + -ate.