| ANTIRRHINUMS | • antirrhinums n. Plural of antirrhinum. • ANTIRRHINUM n. a garden flower, aka snapdragon. |
| BARRAMUNDIES | • BARRAMUNDI n. (Native Australian) an Australian river-fish, also BARRAMUNDA, BURRAMUNDI. |
| COUNTERMARKS | • countermarks n. Plural of countermark. • COUNTERMARK n. an additional mark put on a bale of goods belonging to several merchants, so that it may not be opened except in the presence of all the owners. |
| MERCURATIONS | • MERCURATION n. conversion into a mercury compound. |
| MURMURATIONS | • murmurations n. Plural of murmuration. • MURMURATION n. murmuring. |
| NURSERYMAIDS | • nurserymaids n. Plural of nurserymaid. • NURSERYMAID n. one employed to look after small children. |
| ORGANISTRUMS | • organistrums n. Plural of organistrum. • ORGANISTRUM n. an early musical instrument resembling the hurdy-gurdy. |
| PARAMENSTRUA | • PARAMENSTRUUM n. the four days before and the four days after the onset of menstruation. |
| PERICRANIUMS | • pericraniums n. Plural of pericranium. • PERICRANIUM n. a membrane covering the skull. |
| PREMEASURING | • premeasuring v. Present participle of premeasure. • PREMEASURE v. to measure in advance. |
| PREMENSTRUAL | • premenstrual adj. Occurring in the time period during the menstrual cycle leading up to the beginning of menstruation. • premenstrual adj. Relating to the time period in a girl’s life prior to her first experience of menstruation; prepubescent. • PREMENSTRUAL adj. taking place before menstruation. |
| REMUNERATORS | • remunerators n. Plural of remunerator. • REMUNERATOR n. one who remunerates. |
| TRANSURANIUM | • transuranium adj. Transuranic. • TRANSURANIUM adj. of an element, having an atomic number greater than that of uranium, also TRANSURANIAN. |
| ULTRAMARINES | • ultramarines n. Plural of ultramarine. • ULTRAMARINE n. a greenish-blue color or pigment. |
| UNDERDAMPERS | • underdampers n. Plural of underdamper. • UNDERDAMPER n. in a type of upright piano, a damper positioned below the hammers. |
| UNDERSTRATUM | • understratum n. The layer, or stratum, of earth on which the soil rests; the subsoil. • UNDERSTRATUM n. a stratum under another stratum. |
| UNSCRAMBLERS | • unscramblers n. Plural of unscrambler. • UNSCRAMBLER n. one who unscrambles. |
| URANOMETRIES | • uranometries n. Plural of uranometry. • URANOMETRY n. a chart or catalogue of fixed stars, esp. of stars visible to the naked eye. |