- 1. n. A shelly plate found in the terminal chambers of ammonite shells. Some authors consider them to be jaws; others, opercula. Source: opted
- 2. A shelly plate found in the terminal chambers of ammonite shells. Some authors consider them to be jaws; others, opercula. Source: webster
- 3. A shelly plate found in the terminal chambers of ammoniteshells. Some authors consider them to be jaws; others, opercula. Source: adambom
Home / Dictionary / aptychus
aptychus
Thesaurus links
Related headwords in VividLex — dictionary ↔ thesaurus bridge for exploration and SEO depth.