| HOPLOLOGIST | • hoplologist n. Someone who is an expert in weapons and armour (especially military uses or knowledge thereof). • HOPLOLOGIST n. a student of hoplology, the study of weapons. |
| HOROSCOPIST | • horoscopist n. One versed in horoscopy; an astrologer. • HOROSCOPIST n. one who casts horoscopes, an astrologer. |
| OPHIOLOGIST | • ophiologist n. One who studies ophiology. • OPHIOLOGIST n. a student of ophiology. |
| OPISTHOSOMA | • opisthosoma n. (Zoology) The posterior abdomen of the chelicerates. • OPISTHOSOMA n. the abdomen of a spider or other arachnid. |
| ORNITHOPODS | • ornithopods n. Plural of ornithopod. • ORNITHOPOD n. a member of a suborder of bipedal ornithischian (bird-hipped) dinosaurs. |
| ORTHOSCOPIC | • orthoscopic adj. Free from optical distortion. • ORTHOSCOPIC adj. giving undistorted vision. |
| PHONOLOGIST | • phonologist n. (Linguistics) A person who specializes in phonology, the functional use of sounds in language. • PHONOLOGIST n. a student of phonology, the branch of linguistics that deals with systems of sounds. |
| PHOTOCOPIES | • photocopies n. Plural of photocopy. • photocopies v. Third-person singular simple present indicative form of photocopy. • PHOTOCOPY v. to make a photocopy of. |
| PHOTODIODES | • photodiodes n. Plural of photodiode. • PHOTODIODE n. a two-electrode semiconductor device. |
| PHOTOIONISE | • PHOTOIONISE v. to ionize by electromagnetic radiation, also PHOTOIONIZE. |
| PHOTOLITHOS | • PHOTOLITHO n. (short for) a photolithograph. |
| PHOTOMOSAIC | • photomosaic n. (Photography) A composite image made of individual photographs, normally of the same shape and size… • PHOTOMOSAIC n. an image composed of many smaller photographs. |
| RADIOPHOTOS | • radiophotos n. Plural of radiophoto. • RADIOPHOTO n. a picture transmitted by radio. |
| TOCOPHOBIAS | • TOCOPHOBIA n. an abnormal fear of giving birth or becoming pregnant. |
| TOKOPHOBIAS | • TOKOPHOBIA n. an abnormal fear of giving birth or becoming pregnant. |
| ZOOTROPHIES | • ZOOTROPHY n. the feeding of animals. |