Definition of "plicae" []

• Plural form of plica. (noun)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "[PLICATULA MARGINATA] Shell strong and thick, but rather small; valves sub-equal, ovate, wedge-form, with three strong radiating plicae."
• "Their section is circular with an inner pair of opposed carinae; and their surface is subdivided into numerous narrow planes and provided with a few vertical interrupted plicae, which are more numerous internally."
• "[GALEODIA HODGII] Shell rather thick; elliptical, obtuse; whirls about five, inflated, and ornamented with numerous fine spiral lines, which are quite prominent at base; these, with the fine lines of growth, give the surface a cancellated appearance; collumellar lip marked with many irregular plicae; aperture nearly twice the length of the spire."