| DURALUMINIUMS | • DURALUMINIUM n. a strong, light, aluminium alloy containing copper, also DURAL, DURALUMIN. |
| MUCOCUTANEOUS | • mucocutaneous adj. Of or pertaining to the mucous membranes and the skin. • MUCOCUTANEOUS adj. designating the junction between a mucous membrane and the skin, as at the mouth, anus, etc. |
| MULTITUDINOUS | • multitudinous adj. Existing in great numbers; innumerable. • multitudinous adj. Comprising a large number of parts. • multitudinous adj. Crowded with many people. |
| MULTUNGULATES | • multungulates n. Plural of multungulate. • MULTUNGULATE n. a multungulate animal. |
| NEUROMUSCULAR | • neuromuscular adj. (Anatomy) Pertaining to the voluntary or reflexive control of muscles by nerves. • NEUROMUSCULAR adj. of or relating to nerves and muscles. |
| QUINQUENNIUMS | • quinquenniums n. Plural of quinquennium. • QUINQUENNIUM n. a period of five years, also QUINQUENNIAD. |
| SUBBITUMINOUS | • subbituminous adj. Partly or imperfectly bituminous. • SUBBITUMINOUS adj. of, relating to, or being coal of lower rank than bituminous coal but higher than lignite. |
| SUMPTUOUSNESS | • sumptuousness n. (Uncountable) The state or quality of being sumptuous. • sumptuousness n. (Countable, rare) The result or product of being sumptuous. • SUMPTUOUSNESS n. the quality of being sumptuous. |
| SUSTENTACULUM | • sustentaculum n. (Anatomy, zoology) A supporting structure, a body part that supports one or more other parts. • SUSTENTACULUM n. a supporting part or structure. |
| TUMULTUATIONS | • tumultuations n. Plural of tumultuation. • TUMULTUATION n. (archaic) a tumult. |
| ULTRALUMINOUS | • ultraluminous adj. Very luminous. |
| UNAMBIGUOUSLY | • unambiguously adv. In a manner that is not ambiguous; leaving no doubt; clearly. • UNAMBIGUOUS adv. not ambiguous. |
| UNMISTRUSTFUL | • unmistrustful adj. Not mistrustful. • UNMISTRUSTFUL adj. not mistrustful. |
| UNMURMURINGLY | • unmurmuringly adv. Without protest or complaint. • UNMURMURING adv. not murmuring. |
| UNNILQUADIUMS | • UNNILQUADIUM n. a former name of the transuranic element rutherfordium. |