Dictionary.com
Thesaurus.com

inoperculate

American  
[in-oh-pur-kyuh-lit, -leyt] / ˌɪn oʊˈpɜr kyə lɪt, -ˌleɪt /

adjective

Zoology, Botany.
  1. having no operculum.


Etymology

Origin of inoperculate

First recorded in 1825–35; in- 3 + operculate