| BRACHYPTERISM | • BRACHYPTERISM n. the state of having abnormally short wings. |
| CARYOPTERISES | • CARYOPTERIS n. any of several deciduous subshrubs of the genus Caryopteris, having small, blue flowers. |
| COLEOPTERISTS | • coleopterists n. Plural of coleopterist. • COLEOPTERIST n. one who studies beetles. |
| HELICOPTERING | • helicoptering v. Present participle of helicopter. • helicoptering n. Transport by helicopter. • HELICOPTER v. to travel by helicopter. |
| LEPIDOPTERIST | • lepidopterist n. Someone who studies lepidoptery; someone who studies butterflies and moths. • LEPIDOPTERIST n. a specialist in lepidopterology. |
| NEUROPTERISTS | • NEUROPTERIST n. a person who studies the Neuropteroidea, lacewing flies. |
| ORTHOPTERISTS | • orthopterists n. Plural of orthopterist. • ORTHOPTERIST n. a student of insects. |
| 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. |
| TRICHOPTERIST | • TRICHOPTERIST n. someone who studies the caddis flies. |
| XANTHOPTERINE | • xanthopterine n. Alternative form of xanthopterin. • XANTHOPTERINE n. a yellow pigment obtainable from the wings of yellow butterflies and the urine of mammals, also XANTHOPTERIN. |
| XANTHOPTERINS | • xanthopterins n. Plural of xanthopterin. • XANTHOPTERIN n. a yellow pigment obtainable from the wings of yellow butterflies and the urine of mammals, also XANTHOPTERINE. |