| ANORTHOSITE | • anorthosite n. (Petrology) A phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar. • ANORTHOSITE n. an igneous rock that consists of 90 or more percent of plagioclase feldspar, typically labradorite. |
| BOTHERATION | • botheration interj. A mild expression of annoyance or exasperation: bother! • botheration n. (Uncountable) The state of being bothered; annoyance, vexation. • botheration n. (Countable) An act of bothering or annoying. |
| BUTTONHOLER | • buttonholer n. One who detains somebody in conversation against their will. • buttonholer n. An attachment for a sewing machine which automates the side-to-side and forward-and-backward motions… • BUTTONHOLER n. a person or sewing-machine attachment that makes buttonholes. |
| COUNTERSHOT | • countershot n. A shot made in response to another shot (as from a gun or cannon). • countershot n. (Film) A shot taken to contrast with another. • COUNTERSHOT n. a shot in retaliation. |
| DEHORTATION | • dehortation n. (Archaic) Advice against something; dissuasion. • DEHORTATION n. advice against something, dissuasion. |
| EXHORTATION | • exhortation n. The act or practice of exhorting; the act of inciting to laudable deeds; incitement to that which is… • exhortation n. Language intended to incite and encourage. • EXHORTATION n. an act or instance of exhorting. |
| HETEROCONTS | • HETEROCONT n. a kind of yellow-green alga, also HETEROKONT. |
| HETEROKONTS | • heterokonts n. Plural of heterokont. • HETEROKONT n. a kind of yellow-green alga, also HETEROCONT. |
| NORTHERMOST | • northermost adj. Synonym of northernmost. • NORTHERMOST adj. most northerly, also NORTHERNMOST, NORTHMOST. |
| NOTOTHERIUM | • Nototherium prop.n. A taxonomic genus within the family Diprotodontidae – extinct marsupials with hypsodont molars, a relative… • NOTOTHERIUM n. an extinct Pleistocene rhinoceros-sized marsupial of the genus Nototherium, related to the wombats. |
| ORNITHOPTER | • ornithopter n. An aircraft that generates lift through the flapping of its wings. • ORNITHOPTER n. a birdlike archaic flying machine. |
| 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. |
| OTTERHOUNDS | • otterhounds n. Plural of otterhound. • Otterhounds n. Plural of Otterhound. • OTTERHOUND n. a hound used to hunt otters. |
| TAUTOCHRONE | • tautochrone n. (Mathematics) A curve, such that a heavy body, descending along it by the action of gravity, will always… • TAUTOCHRONE n. a curve such that a particle travelling along it under gravity reaches a fixed point in the same time, no matter where it starts. |
| TENTERHOOKS | • tenterhooks n. Plural of tenterhook. • tenter␣hooks n. Plural of tenter hook. • TENTERHOOK n. a sharp, hooked nail to fasten cloth to a tenter. |
| TOPNOTCHERS | • topnotchers n. Plural of topnotcher. • top-notchers n. Plural of top-notcher. • TOPNOTCHER n. crude oil after some of its lighter constituents have been removed by distillation. |