Definitions

1. adjective

Pertaining to a thallus or frond that is leaf-like, with a central axis and lateral appendages.

“The ceratothecal leaves of the fern were a distinguishing feature of its species.”

2. noun

A thallus or frond that is leaf-like, with a central axis and lateral appendages.

“The ceratothecal of the fern was used to identify it in the field guide.”