| DELTIOLOGISTS | • deltiologists n. Plural of deltiologist. • DELTIOLOGIST n. a collector of picture postcards. |
| DIABETOLOGIST | • diabetologist n. A physician whose speciality is diabetology. • DIABETOLOGIST n. a doctor specializing in the study and treatment of diabetes and the care of diabetics. |
| EXCOGITATIONS | • excogitations n. Plural of excogitation. • EXCOGITATION n. the act of excogitating. |
| GHETTOISATION | • ghettoisation n. Alternative spelling of ghettoization. • GHETTOISATION n. the process of ghettoising, also GHETTOIZATION. |
| GHETTOIZATION | • ghettoization n. The process of becoming a ghetto, an isolated and underprivileged urban area. • ghettoization n. The process of ghettoizing (a group): the segregation/isolation of a group and placement of that group… • GHETTOIZATION n. the process of ghettoizing, also GHETTOISATION. |
| INSECTOLOGIST | • insectologist n. A scientist who studies insects. • INSECTOLOGIST n. a student of insectology. |
| INTERROGATION | • interrogation n. The act of interrogating or questioning; examination by questions; inquiry. • interrogation n. A question put; an inquiry. • interrogation n. (Dated) A question mark. |
| METACOGNITION | • metacognition n. (Philosophy) the act of thinking about thinking; sentience. • METACOGNITION n. thinking about one's own mental processes. |
| PTERIDOLOGIST | • pteridologist n. A person who studies ferns and other pteridophytes. • PTERIDOLOGIST n. one who studies pteridology. |
| RENEGOTIATION | • renegotiation n. The act of negotiating again. • RENEGOTIATION n. the act of renegotiating. |
| SOVIETOLOGIST | • Sovietologist n. A person who engages in Sovietology. • SOVIETOLOGIST n. an expert on Soviet affairs. |
| TERMINOLOGIST | • terminologist n. (Translation studies) A person who studies and uses terminology, especially in professional translation… • TERMINOLOGIST n. a specialist in terminology. |
| TRIGONOMETRIC | • trigonometric adj. (Mathematics) of, relating to, or constructed using trigonometry. • TRIGONOMETRIC adj. relating to trigonometry, also TRIGONOMETRICAL. |