| ARCHAEORNISES | • ARCHAEORNIS n. a primitive reptile-like fossil bird. |
| CORNIFICATION | • cornification n. Conversion into, or formation of, horn. • cornification n. A general hardening of the skin. • CORNIFICATION n. conversion into horn or a horny or keratinous substance or tissue. |
| FLUGELHORNIST | • flugelhornist n. One who plays the flugelhorn. • FLUGELHORNIST n. one who plays the flugelhorn. |
| ICHTHYORNISES | • ICHTHYORNIS n. a toothed fossil bird of America. |
| ODONTORNITHES | • ODONTORNITHES n. fossil birds with teeth. |
| ORNITHICHNITE | • ornithichnite n. (Paleontology) A fossilised footprint left by a bird. • ORNITHICHNITE n. a fossil footprint of a bird. |
| ORNITHISCHIAN | • ornithischian n. Any of a group of dinosaurs, of the order Ornithischia, that have hips characteristic of birds. • ORNITHISCHIAN n. any of an order of herbivorous dinosaurs. |
| ORNITHOGALUMS | • ORNITHOGALUM n. a plant of a large genus of herbs of the family Liliaceae. |
| ORNITHOLOGIES | • ornithologies n. Plural of ornithology. • ORNITHOLOGY n. the study of birds. |
| ORNITHOLOGIST | • ornithologist n. A person who studies or practices ornithology. • ORNITHOLOGIST n. one who studies birds. |
| ORNITHOMANTIC | • ornithomantic adj. Relating to ornithomancy. • ORNITHOMANTIC adj. relating to ornithomancy, divination by observing flight of birds. |
| ORNITHOMORPHS | • ornithomorphs n. Plural of ornithomorph. • ORNITHOMORPH n. a figure or design in the form of a bird. |
| ORNITHOPHOBIA | • ornithophobia n. Fear of birds. • ORNITHOPHOBIA n. fear of birds. |
| PEPPERCORNIER | • PEPPERCORNY adj. containing or tasting like peppercorn. |
| PORNIFICATION | • pornification n. Conversion to the style or level of pornography. • PORNIFICATION n. the introduction of pornographic elements into a film etc. |
| YESTERMORNING | • yestermorning n. (Archaic) Yesterday morning. • YESTERMORNING n. yesterday evening or morning. |