| COPATRONS | • copatrons n. Plural of copatron. • COPATRON n. a fellow patron. |
| CORPOSANT | • corposant n. An electrical discharge accompanied by a corona of ionization in the surrounding atmosphere. • CORPOSANT n. St Elmo's fire or similar electrical discharge. |
| DROPSTONE | • dropstone n. (Geology) An isolated fragment of rock found within a sedimentary rock (that had fallen, rather than… • dropstone n. (Glaciology) An isolated rock that is geologically distinct from the surroundings, indicating that it… • DROPSTONE n. a stone embedded in a sedimentary deposit and believed to have got there after being released from a melting glacier. |
| HORNPOUTS | • hornpouts n. Plural of hornpout. • HORNPOUT n. a kind of catfish. |
| INOTROPES | • inotropes n. Plural of inotrope. • INOTROPE n. a drug for controlling the force of muscular contractions. |
| MOONPORTS | • moonports n. Plural of moonport. • MOONPORT n. a facility for launching spacecraft to the moon. |
| OPTRONICS | • optronics n. Optoelectronics. • OPTRONICS n. the study or use of devices involving the interaction of electronic and light signals. |
| PENTROOFS | • pentroofs n. Plural of pentroof. • pent␣roofs n. Plural of pent roof. • PENTROOF n. a roof that slopes one way only. |
| PINKROOTS | • pinkroots n. Plural of pinkroot. • PINKROOT n. a medicinal plant root, aka wormroot. |
| PLIOTRONS | • pliotrons n. Plural of pliotron. • PLIOTRON n. a type of vacuum tube. |
| POLTROONS | • poltroons n. Plural of poltroon. • POLTROON n. a despicable coward, also POULTROONE. |
| PORTOLANS | • portolans n. Plural of portolan. • PORTOLAN n. (Italian) in the Middle Ages, a navigation manual, also PORTOLANO, PORTULAN. |
| POSITRONS | • positrons n. Plural of positron. • POSITRON n. an electron but with a positive charge, also POSITON. |
| POSTPONER | • postponer n. One who postpones. • POSTPONER n. one who postpones. |
| PRONATORS | • pronators n. Plural of pronator. • PRONATOR n. a forearm or forelimb muscle. |
| SHOPFRONT | • shopfront n. The side of a shop that faces the street, usually having display windows. • shop␣front n. Alternative form of shopfront. • SHOPFRONT n. the front of a shop. |
| SORPTIONS | • sorptions n. Plural of sorption. • SORPTION n. absorption and/or adsorption. |
| STONECROP | • stonecrop n. Any of various succulent plants of the Crassulaceae family, native to temperate zones, especially in genus Sedum. • stonecrop n. Certain plants of genus Lithospermum, in family Boraginaceae. • STONECROP n. a yellow flower of rockeries etc. |
| TROPONINS | • troponins n. Plural of troponin. • TROPONIN n. a protein of muscle. |