| DEHORTATORY | • dehortatory adj. Fitted or designed to dehort or dissuade. • DEHORTATORY adj. dissuasive, also DEHORTATIVE. |
| EXHORTATORY | • exhortatory adj. Serving to exhort. • EXHORTATORY adj. using exhortation. |
| HETEROTROPH | • heterotroph n. (Ecology) An organism which requires an external supply of energy in the form of food as it cannot synthesize its own. • HETEROTROPH n. a secondary feeder eating plants or other animals. |
| MOTHERWORTS | • motherworts n. Plural of motherwort. • MOTHERWORT n. a labiate herb, of a bitter taste, used popularly in medicine. |
| NORTHERMOST | • northermost adj. Synonym of northernmost. • NORTHERMOST adj. most northerly, also NORTHERNMOST, NORTHMOST. |
| ORNITHOPTER | • ornithopter n. An aircraft that generates lift through the flapping of its wings. • ORNITHOPTER n. a birdlike archaic flying machine. |
| ORTHOBORATE | • orthoborate n. (Inorganic chemistry) Any anion derived from orthoboric acid; any salt containing this anion. • ORTHOBORATE n. a salt of orthoboric acid. |
| ORTHOCENTER | • orthocenter n. (Geometry) The intersection of the three lines that can be drawn flowing from the three corners of a… • ORTHOCENTER n. the point of intersection of the altitudes of a triangle, also ORTHOCENTRE. |
| ORTHOCENTRE | • orthocentre n. Alternative form of orthocenter. • ORTHOCENTRE n. the point of intersection of the altitudes of a triangle, also ORTHOCENTER. |
| ORTHOPTERAN | • orthopteran n. (Zoology) Any of many insects of the order Orthoptera. • ORTHOPTERAN n. any member of the Orthoptera, an order of mandibulate insects, also ORTHOPTERON. |
| ORTHOPTERON | • orthopteron n. Alternative form of orthopteran. • ORTHOPTERON n. any member of the Orthoptera, an order of mandibulate insects, also ORTHOPTERAN. |
| THERETOFORE | • theretofore adv. Until that time. • theretofore adv. Before that. • THERETOFORE adv. up to that time. |
| THERMOMOTOR | • THERMOMOTOR n. an engine that produces force from the expansion of a heated fluid. |
| TRAPSHOOTER | • trapshooter n. A participant in the sport of trapshooting. • TRAPSHOOTER n. a person who engages in trapshooting. |
| TROCHOMETER | • trochometer n. A device for counting the revolutions of a wheel; an odometer. • TROCHOMETER n. a hodometer, also TROCHEAMETER. |