The Collaborative International Dictionary
Dithecal
Dithecal \Di*the"cal\, Dithecous \Di*the"cous\, a. [Pref. di- + theca.] (Bot.) Having two thec[ae], cells, or compartments.
Wiktionary
dithecal
a. (context botany English) Having two thecae. alt. (context botany English) Having two thecae.