| PTERIDINE | • pteridine n. (Organic chemistry) A bicyclic aromatic heterocycle consisting of fused pyrimidine and pyrazine rings. • PTERIDINE n. any member of a genus of ferns that includes bracken. |
| PTERIDINES | • pteridines n. Plural of pteridine. • PTERIDINE n. any member of a genus of ferns that includes bracken. |
| PTERIDOLOGY | • pteridology n. (Botany) The scientific study of ferns and other pteridophytes. • PTERIDOLOGY n. the study of ferns. |
| PTERIDOMANIA | • pteridomania n. A craze, in 19th-century England, for collecting ferns and for using images of ferns in the decorative arts. • PTERIDOMANIA n. a passion for ferns. |
| PTERIDOPHYTE | • pteridophyte n. Any plant of the division Pteridophyta, of simple vascular plants that reproduce via spores rather than… • PTERIDOPHYTE n. the general name for the ferns and their allies. |
| PTERIDOSPERM | • pteridosperm n. Any of various extinct gymnosperms, of the division Pteridospermatophyta, resembling ferns, but producing… • PTERIDOSPERM n. an extinct group of seed plants which bore fernlike leaves. |
| PTERIDOLOGIES | • PTERIDOLOGY n. the study of ferns. |
| PTERIDOLOGIST | • pteridologist n. A person who studies ferns and other pteridophytes. • PTERIDOLOGIST n. one who studies pteridology. |
| PTERIDOMANIAS | • PTERIDOMANIA n. a passion for ferns. |
| PTERIDOPHYTES | • pteridophytes n. Plural of pteridophyte. • PTERIDOPHYTE n. the general name for the ferns and their allies. |
| PTERIDOPHYTIC | • pteridophytic adj. Of or pertaining to the ferns of the division Pteridophyta. • PTERIDOPHYTIC adj. of or like a pteridophyte, a fern, also PTERIDOPHYTOUS. |
| PTERIDOSPERMS | • pteridosperms n. Plural of pteridosperm. • PTERIDOSPERM n. an extinct group of seed plants which bore fernlike leaves. |
| PTERIDOLOGICAL | • pteridological adj. Relating to pteridology. • PTERIDOLOGICAL adj. relating to pteridology, the study of ferns. |
| PTERIDOLOGISTS | • pteridologists n. Plural of pteridologist. • PTERIDOLOGIST n. one who studies pteridology. |
| PTERIDOPHILIST | • PTERIDOPHILIST n. a fern-lover. |
| PTERIDOPHYTOUS | • PTERIDOPHYTOUS adj. of or like a pteridophyte, a fern, also PTERIDOPHYTIC. |
| PTERIDOPHILISTS | • PTERIDOPHILIST n. a fern-lover. |