| EMMETROPIAS | • emmetropias n. Plural of emmetropia. • EMMETROPIA n. correct refraction of light by the eyes. |
| EMPLASTRUMS | • EMPLASTRUM n. a medicated plaster, also EMPLASTRON. |
| HEMITROPISM | • HEMITROPISM n. the state of being a hemitrope, a twinned crystal. |
| IMPAIRMENTS | • impairments n. Plural of impairment. • IMPAIRMENT n. the state of being impaired. |
| IMPARTMENTS | • impartments n. Plural of impartment. • IMPARTMENT n. the act of imparting. |
| IMPRESSMENT | • impressment n. The act of seizing for public use; impressing into public service. • IMPRESSMENT n. the act of seizing for public use or of impressing into public service. |
| JUMPMASTERS | • jumpmasters n. Plural of jumpmaster. |
| METEMPIRICS | • metempirics n. The concepts and relations which are conceived as beyond, and yet related to, the knowledge gained by experience. • METEMPIRICS n. the study of the existence of things beyond the scope of experience. |
| MISTEMPERED | • mistempered v. Simple past tense and past participle of mistemper. • MISTEMPER v. (obsolete) to temper ill; to disorder. |
| PENTAMERISM | • pentamerism n. Five-part radial symmetry. • PENTAMERISM n. the condition of being pentamerous, having parts arranged in fives, also PENTAMERY. |
| POSTMORTEMS | • postmortems n. Plural of postmortem. • post-mortems n. Plural of post-mortem. • post␣mortems n. Plural of post mortem. |
| PROMETHEUMS | • PROMETHEUM n. the former name of promethium, a radioactive element, also PROMETHIUM. |
| PROMETHIUMS | • PROMETHIUM n. a radioactive rare-earth element, also PROMETHEUM. |
| SEMPITERNUM | • sempiternum n. A durable twilled woollen material. • SEMPITERNUM n. (obsolete) a durable woollen cloth. |
| STIMPMETERS | • Stimpmeters n. Plural of Stimpmeter. • STIMPMETER n. a device that measures the speed of a putting green by propelling a golf ball down a ramp at a standard initial velocity and measuring how far it travels. |
| SUPREMATISM | • suprematism n. Alternative letter-case form of Suprematism. • Suprematism n. (Art) A genre of abstract art based on simple geometric forms. • SUPREMATISM n. an early 20th century art movement in Russia producing abstract works featuring flat geometric forms. |
| TRIPHAMMERS | • triphammers n. Plural of triphammer. • trip␣hammers n. Plural of trip hammer. • TRIPHAMMER n. a power hammer that is raised or tilted by a cam and allowed to fall under gravity. |