| ARBITRATORS | • arbitrators n. Plural of arbitrator. • ARBITRATOR n. one that arbitrates. |
| ARTERIOGRAM | • arteriogram n. An X-ray of an artery after injection with a radiopaque material. • ARTERIOGRAM n. a radiograph of an artery made by arteriography. |
| GARBURATORS | • garburators n. Plural of garburator. • GARBURATOR n. (Canadian) an electrically operated device in the plughole of a kitchen sink that breaks up food refuse so that it can travel down the waste pipe. |
| IRRADIATORS | • irradiators n. Plural of irradiator. • IRRADIATOR n. something or someone that irradiates. |
| MICROARRAYS | • microarrays n. Plural of microarray. • MICROARRAY n. a collection of microscopic DNA spots, aka gene chip. |
| MORTARBOARD | • mortarboard n. A square board, with a handle, on which mortar or plaster is carried: a hawk. • mortarboard n. An academic cap that has a flat square top with a tassel. • MORTARBOARD n. a square-topped college cap. |
| OVERARRANGE | • overarrange v. (Transitive) To arrange excessively or too precisely. • OVERARRANGE v. to arrange to excess. |
| PARATROOPER | • paratrooper n. A type of soldier who is trained to enter combat zones by parachuting from aircraft. • PARATROOPER n. a member of the paratroops. |
| PREPARATORS | • preparators n. Plural of preparator. • PREPARATOR n. one who prepares beforehand, as subjects for dissection, specimens for preservation in collections, etc. |
| PREPARATORY | • preparatory adj. Of or pertaining to preparation, having the purpose of making something or someone ready, preparative. • PREPARATORY adj. by way of preparation. |
| RADIOTRACER | • radiotracer n. (Sciences) A radioactive tracer; a radiolabel. • RADIOTRACER n. a radioactive tracer. |
| RAILROADERS | • railroaders n. Plural of railroader. • RAILROADER n. a railway worker or official. |
| REPATRIATOR | • repatriator n. One who repatriates. • REPATRIATOR n. one who repatriates. |
| RETARDATORY | • retardatory adj. Retardant; delaying. • RETARDATORY adj. tending to retard. |
| SPARROWFART | • sparrowfart n. Alternative form of sparrow-fart. • sparrow-fart n. (Uncountable, UK, Australia, New Zealand, slang) A time very early in the day; dawn. • sparrow-fart n. (Countable) A person or thing of no consequence. |