| AEROGRAPH | • aerograph n. A kind of airbrush. • AEROGRAPH n. an airborne meteorological recording instrument. |
| ARCHOSAUR | • archosaur n. A reptile of the taxon Archosauria, which includes the extinct dinosaurs, plesiosaurs, pterosaurs and… • ARCHOSAUR n. any of a subclass of reptiles comprising pterosaurs, dinosaurs and crocodilians. |
| ARCOGRAPH | • arcograph n. An instrument for drawing a circular arc without the use of a central point. • ARCOGRAPH n. an instrument for drawing arcs without using a central point. |
| ARROWHEAD | • arrowhead n. (Weaponry) The pointed part of an arrow. • arrowhead n. (Symbol) The pointed part of an arrow. • arrowhead n. Any plant in the genus Sagittaria. |
| ARTHRODIA | • arthrodia n. (Anatomy) A form of diarthrodial articulation in which the articular surfaces are nearly flat, so that… • ARTHRODIA n. in zoology, a joint. |
| BAROGRAPH | • barograph n. A type of barometer that continuously records air pressure on a sheet or rotating drum. • BAROGRAPH n. a recording barometer. |
| DIARRHOEA | • diarrhoea n. British form standard spelling of diarrhea. • diarrhœa n. (Chiefly British spelling) Archaic spelling of diarrhea. • DIARRHOEA n. a persistent purging or looseness of the bowels, also DIARRHEA. |
| HADROSAUR | • hadrosaur n. (Paleontology) Any ornithopod dinosaur of the family Hadrosauridae. • HADROSAUR n. a bird-hipped dinosaur of the Cretaceous. |
| HARBORAGE | • harborage n. (US, nautical) A place for refuge for a vessel. • harborage n. (US, law) A condition on land favorable to infestation by animals considered pests. • harborage n. A place of shelter or entertainment. |
| HARDBOARD | • hardboard n. A high-density chipboard. • HARDBOARD n. compressed board made from wood fibre. |
| HONORARIA | • honoraria n. Plural of honorarium. • HONORARIUM n. a voluntary fee paid esp. to a professional person for their services. |
| PARACHORS | • parachors n. Plural of parachor. • PARACHOR n. a mathematical constant relating to surface tension. |
| PARAMORPH | • paramorph n. (Mineralogy) A kind of pseudomorph in which there has been a change of physical characteristics without… • PARAMORPH n. a pseudomorph formed by a change in molecular structure without change of chemical composition. |