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.



Definition of Aptychus

1. Noun. A marine fossil consisting of a hard anatomical structure like a curved shelly plate, once part of the body of an ammonite. ¹

¹ Source: wiktionary.com

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)

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Lexicographical Neighbors of Aptychus

aptitudinal
aptitudinally
aptly
aptness
aptnesses
aptonym
aptonyms
aptote
aptotes
aptotic
aptronym
aptronyms
apts
aptyalism
aptychi
aptychus (current term)
apuanite
apud cells
apudoma
apurinic
apurinic DNA
apurinic acid
apurinic site
apus
apyknomorphous
apyrase
apyrases
apyretic
apyretic tetanus
apyretic typhoid

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