| MEGALOPOLISES | • megalopolises n. Plural of megalopolis. • MEGALOPOLIS n. a wide-spreading, thickly-populated urban area. |
| OSCILLOGRAPHS | • oscillographs n. Plural of oscillograph. • OSCILLOGRAPH n. an instrument for recording alternating current wave forms. |
| OSCILLOGRAPHY | • oscillography n. Measurement by means of an oscillograph. • OSCILLOGRAPHY n. use of an oscillograph. |
| PALYNOLOGISTS | • palynologists n. Plural of palynologist. • PALYNOLOGIST n. a student of palynology. |
| PHYLLOPHAGOUS | • phyllophagous adj. (Zoology) that feeds on leaves; leaf-eating. • PHYLLOPHAGOUS adj. leaf-eating. |
| PHYSIOLOGICAL | • physiological adj. Of, or relating to physiology. • physiological adj. Relating to the action of a drug when given to a healthy person, as distinguished from its therapeutic action. • PHYSIOLOGICAL adj. relating to physiology, also PHYSIOLOGIC. |
| PLANETOLOGIES | • PLANETOLOGY n. the study of planets. |
| PLANETOLOGIST | • planetologist n. Planetary scientist. • PLANETOLOGIST n. one who studies planetology. |
| POLYGALACEOUS | • polygalaceous adj. Of or pertaining to a family of plants (Polygalaceae) of which Polygala is the type. • POLYGALACEOUS adj. belonging to the family Polygalaceae, milkworts. |
| PSEPHOLOGICAL | • psephological adj. Of or pertaining to psephology. • PSEPHOLOGICAL adj. related to psephology. |
| PSYCHOLOGICAL | • psychological adj. Of or pertaining to psychology. • psychological adj. Relating to the mind and behavior or to the mental, emotional, and behavioral characteristics pertaining… • psychological adj. Without an objective, or reasonably logical foundation. |
| PYROBALLOGIES | • PYROBALLOGY n. the study of artillery. |
| SPELAEOLOGIES | • SPELAEOLOGY n. the study and exploration of caves, also SPELEOLOGY. |
| SPELAEOLOGIST | • spelaeologist n. Alternative form of speleologist. • SPELAEOLOGIST n. one who explores caves. |
| SPELEOLOGICAL | • speleological adj. Pertaining to the exploration of caves; speleology. • speleological adj. Concerning the study of caves. • SPELEOLOGICAL adj. relating to speleology. |
| SPLANCHNOLOGY | • splanchnology n. (Anatomy, obsolete) The scientific study of the viscera. • SPLANCHNOLOGY n. the study of the entrails or viscera. |