| CORROBORATIONS | • corroborations n. Plural of corroboration. • CORROBORATION n. corroboration. |
| GNOTOBIOLOGIES | • GNOTOBIOLOGY n. the study of life in germfree conditions. |
| MONOCHROMATORS | • monochromators n. Plural of monochromator. • MONOCHROMATOR n. a device for isolating a narrow portion of a spectrum. |
| MONOCOTYLEDONS | • monocotyledons n. Plural of monocotyledon. • MONOCOTYLEDON n. a plant having a single cotyledon, also MONOCOT, MONOCOTYL. |
| MONOPOLISATION | • monopolisation n. Alternative spelling of monopolization. • MONOPOLISATION n. the act of monopolising, also MONOPOLIZATION. |
| MONOTONOUSNESS | • monotonousness n. The property of being monotonous. • MONOTONOUS n. uttered or sounded in one unvarying tone. |
| NEOORTHODOXIES | • NEOORTHODOXY n. reactionaryism. |
| NONCOOPERATORS | • noncooperators n. Plural of noncooperator. • NONCOOPERATOR n. one who does not cooperate. |
| ODONATOLOGISTS | • odonatologists n. Plural of odonatologist. • ODONATOLOGIST n. one who studies dragonflies. |
| ODONTOGLOSSUMS | • odontoglossums n. Plural of odontoglossum. • ODONTOGLOSSUM n. any of a genus of widely cultivated tropical American orchids. |
| ONOMATOLOGISTS | • onomatologists n. Plural of onomatologist. • ONOMATOLOGIST n. one who studies onomatology, the science of names. |
| ONOMATOPOIESES | • ONOMATOPOIESIS n. onomatopoeia, also ONOMATOPOEIA, ONOMATOPOESIS. |
| ONOMATOPOIESIS | • onomatopoiesis n. Onomatopoeia. • ONOMATOPOIESIS n. onomatopoeia, also ONOMATOPOEIA, ONOMATOPOESIS. |
| OPISTHOTONOSES | • OPISTHOTONOS n. extreme arching backwards of the spine and neck as a result of spasm of the muscles in that region, etc. |
| PHOTOCOMPOSING | • photocomposing v. Present participle of photocompose. • PHOTOCOMPOSE v. to set (as reading matter) by photocomposition. |
| POLYPROTODONTS | • polyprotodonts n. Plural of polyprotodont. • POLYPROTODONT n. any member of the Polyprotodontia, the suborder of marsupials, including opossums, dasyures, etc., with many small incisors. |