| ORTHOTROPOUS | • orthotropous adj. (Botany, of an ovule) Growing straight and having the micropyle at the apex. • ORTHOTROPOUS adj. growing straight, so that the micropyle is opposite the stalk. |
| OSTEOPOROTIC | • osteoporotic adj. Relating to osteoporosis. • OSTEOPOROTIC adj. relating to osteoporosis. |
| POLYPROTODONT | • polyprotodont n. Any marsupial of the order Polyprotodontia. • POLYPROTODONT n. any member of the Polyprotodontia, the suborder of marsupials, including opossums, dasyures, etc., with many small incisors. |
| ORTHOPTEROLOGY | • orthopterology n. The scientific study of the Orthoptera. • ORTHOPTEROLOGY n. the study of cockroaches. |
| PHOTOAUTOTROPH | • photoautotroph n. (Biology) an organism, such as all green plants, that can synthesize its own food from inorganic material… • PHOTOAUTOTROPH n. an organism capable of synthesizing its own food from inorganic substances using light as an energy source. |
| PHOTOCONDUCTOR | • photoconductor n. A material, or a device, that exhibits or utilizes photoconductivity. • PHOTOCONDUCTOR n. a photoconductive substance. |
| POLYPROTODONTS | • polyprotodonts n. Plural of polyprotodont. • POLYPROTODONT n. any member of the Polyprotodontia, the suborder of marsupials, including opossums, dasyures, etc., with many small incisors. |
| PROTOZOOLOGIST | • protozoologist n. A zoologist whose speciality is protozoology. • PROTOZOOLOGIST n. one who studies protozoology. |
| CRYPTOZOOLOGIST | • cryptozoologist n. (Cryptozoology) One who studies cryptozoology. • CRYPTOZOOLOGIST n. one who studies cryptozoology. |
| PHOTOAUTOTROPHS | • photoautotrophs n. Plural of photoautotroph. • PHOTOAUTOTROPH n. an organism capable of synthesizing its own food from inorganic substances using light as an energy source. |
| PHOTOCONDUCTORS | • photoconductors n. Plural of photoconductor. • PHOTOCONDUCTOR n. a photoconductive substance. |
| PHOTOPRODUCTION | • photoproduction n. (Chemistry) The production of a molecular species (e.g. a radical or ion) by means of light. • PHOTOPRODUCTION n. the production of one or more particles by the action of an incident photon. |
| PHOTOTOPOGRAPHY | • phototopography n. The surveying and mapping of a terrain based solely on terrestrial photographs. • PHOTOTOPOGRAPHY n. the preparation of topographic maps from photographs. |
| PROTOZOOLOGISTS | • protozoologists n. Plural of protozoologist. • PROTOZOOLOGIST n. one who studies protozoology. |