| DEONTOLOGISTS | • deontologists n. Plural of deontologist. • DEONTOLOGIST n. a student of deontology. |
| DIAPHOTOTROPY | • DIAPHOTOTROPY n. the state of being diaphototropic, turning transversely to the light. |
| DIPROTODONTID | • diprotodontid n. (Zoology) Any member of the family Diprotodontidae of extinct large marsupials, similar to wombats in form. • DIPROTODONTID n. an animal of the Diprotodontidae, an extinct family of marsupials including the genus Diprotodon. |
| METHODOLOGIST | • methodologist n. A person who studies methodology, or applies its principles. • METHODOLOGIST n. a student of methodology. |
| ODONATOLOGIST | • odonatologist n. One who studies odonatology. • ODONATOLOGIST n. one who studies dragonflies. |
| ODONTOBLASTIC | • odontoblastic adj. Relating to odontoblasts. • ODONTOBLASTIC adj. of or like an odontoblast, a tooth cell in the surface of dental pulp that produces dentine. |
| ODONTOLOGISTS | • odontologists n. Plural of odontologist. • ODONTOLOGIST n. a student of odontology. |
| ODONTORNITHES | • ODONTORNITHES n. fossil birds with teeth. |
| ORTHODONTISTS | • orthodontists n. Plural of orthodontist. • ORTHODONTIST n. one who practises orthodontics. |
| ORTHOPTEROIDS | • orthopteroids n. Plural of orthopteroid. • ORTHOPTEROID n. a member of the Orthoptera, cockroaches. |
| PHOTOCATHODES | • photocathodes n. Plural of photocathode. • PHOTOCATHODE n. a cathode that emits electrons when exposed to radiant energy and esp. light. |
| PHOTODETECTOR | • photodetector n. Any device used to detect electromagnetic radiation. • PHOTODETECTOR n. any of various devices for detecting and measuring the intensity of radiant energy through photoelectric action. |
| PHOTOPRODUCTS | • photoproducts n. Plural of photoproduct. • PHOTOPRODUCT n. a product of a photochemical reaction. |
| 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. |
| POSTDOCTORALS | • postdoctorals n. Plural of postdoctoral. • POSTDOCTORAL n. a degree beyond the doctoral level. |
| POSTDOCTORATE | • postdoctorate adj. Postdoctoral. • postdoctorate n. Synonym of postdoc. • POSTDOCTORATE n. a degree after a doctorate. |
| PROSTHODONTIA | • PROSTHODONTIA n. the provision of false teeth, also PROSTHODONTICS. |
| PROTOCHORDATE | • protochordate n. Any chordate of the phyla Hemichordata, Urochordata or Cephalochordata. • PROTOCHORDATE n. a member of the Protochordata. |
| TETRODOTOXINS | • tetrodotoxins n. Plural of tetrodotoxin. • TETRODOTOXIN n. a deadly nerve poison found in a species of Japanese puffer fish, also TETROTOXIN. |
| ULTRAORTHODOX | • ultraorthodox adj. Very orthodox, chiefly among Jewish sects. • ultra-Orthodox adj. (Of a Jew) Very strictly observant; Haredi; being either Hasidic or Litvish (Misnagdic). • ULTRAORTHODOX adj. extremely orthodox. |