Definition of Aptychus

1. n. A shelly plate found in the terminal chambers of ammonite shells. Some authors consider them to be jaws; others, opercula.

Medical Definition of Aptychus

1. A shelly plate found in the terminal chambers of ammonite shells. Some authors consider them to be jaws; others, opercula. Origin: NL, fr. Gr. Priv. +, fold. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Aptychus

aptitude
aptitude
aptitudes
aptitude test
aptitude tests
aptitudinal
aptitudinally
aptly
aptness
aptnesses
aptote
aptotes
aptotic
apts
aPTT
aptychus (current term)
Apt test
APUD
apudoma
APUD cell
apud cells
Apulia
apurinic acid
apurinic DNA
apurinic site
apus
Apus
Apus apus
apyknomorphous
apyrase

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