| THECAE | • thecae n. Plural of theca. • THECA n. (Greek) a lobe, a lobulus of an anther. |
| OOTHECAE | • oothecae n. Plural of ootheca. • oöthecae n. Plural of oötheca. • OOTHECA n. (Greek) the egg case of certain insects. |
| EPITHECAE | • epithecae n. Plural of epitheca. • EPITHECA n. the outer older cell layer of a diatom. |
| HYPOTHECAE | • hypothecae n. Plural of hypotheca. • HYPOTHECA n. the inner and younger layer of the cell wall of a diatom. |
| HYDROTHECAE | • hydrothecae n. Plural of hydrotheca. • HYDROTHECA n. the horny cup of a hydranth. |
| RHINOTHECAE | • RHINOTHECA n. the sheath of the upper mandible of a bird. |
| BIBLIOTHECAE | • bibliothecae n. Plural of bibliotheca. • BIBLIOTHECA n. a collection of books; a list of books. |
| GLYPTOTHECAE | • GLYPTOTHECA n. a place for keeping sculpture. |
| PINACOTHECAE | • PINACOTHECA n. a picture-gallery. |
| SPERMATHECAE | • spermathecae n. Plural of spermatheca. • SPERMATHECA n. a receptacle for storing spermatozoa in insects. |
| RHAMPHOTHECAE | • rhamphothecae n. Plural of rhamphotheca. • RHAMPHOTHECA n. the horny or leathery outer layer of a bird's bill. |
| SPERMATOTHECAE | • spermatothecae n. Plural of spermatotheca. • SPERMATOTHECA n. a receptacle for storing sperm. |