| NIHONIUM | • nihonium n. The synthetic transactinide chemical element with atomic number 113. • NIHONIUM n. a highly radioactive element, of which only a few atoms have ever been produced. |
| EUPHONIUM | • euphonium n. A valved brass instrument with conical tubing similar in appearance to a tuba but of higher pitch; a sax horn. • EUPHONIUM n. a musical instrument like a tuba but with somewhat higher pitch. |
| NIHONIUMS | • NIHONIUM n. a highly radioactive element, of which only a few atoms have ever been produced. |
| EUPHONIUMS | • euphoniums n. Plural of euphonium. • EUPHONIUM n. a musical instrument like a tuba but with somewhat higher pitch. |
| SULPHONIUM | • sulphonium n. Alternative spelling of sulfonium. • SULPHONIUM n. the positively charged group SH3, its salts or derivatives, also SULFONIUM. |
| PHOSPHONIUM | • phosphonium n. (Chemistry) the tetravalent positively-charged phosphorus cation R4P+. • PHOSPHONIUM n. the radical PH4, analogous to ammonium. |
| SULPHONIUMS | • sulphoniums n. Plural of sulphonium. • SULPHONIUM n. the positively charged group SH3, its salts or derivatives, also SULFONIUM. |
| PHOSPHONIUMS | • phosphoniums n. Plural of phosphonium. • PHOSPHONIUM n. the radical PH4, analogous to ammonium. |
| DECAMETHONIUM | • decamethonium n. (Pharmacology) Synonym of decamethonium bromide. • DECAMETHONIUM n. a type of muscle relaxant. |
| HEXAMETHONIUM | • hexamethonium n. (Pharmacology) Synonym of hexamethonium bromide. • HEXAMETHONIUM n. either of two compounds used as ganglionic blocking agents in the treatment of hypertension. |
| DECAMETHONIUMS | • DECAMETHONIUM n. a type of muscle relaxant. |
| HEXAMETHONIUMS | • hexamethoniums n. Plural of hexamethonium. • HEXAMETHONIUM n. either of two compounds used as ganglionic blocking agents in the treatment of hypertension. |