18-letter words containing p, l, u, m
- sampling frequency — sample rate
- sell someone a pup — to swindle someone by selling him something worthless
- simple enumeration — a procedure for arriving at empirical generalizations by haphazard accumulation of positive instances.
- sodium hyposulfite — sodium thiosulfate.
- sodium polysulfide — a yellow-brown, water-soluble, granular powder, Na 2 S n , used chiefly in the manufacture of sulfur dyes, insecticides, and synthetic rubber.
- sodium-vapour lamp — a type of electric lamp consisting of a glass tube containing neon and sodium vapour at low pressure through which an electric current is passed to give an orange light. They are used in street lighting
- southampton island — an island in N Canada, in the Northwest Territories at the entrance to Hudson Bay. 19,100 sq. mi. (49,470 sq. km).
- spackling compound — spackle
- spectrofluorimeter — an instrument in which the spectrum of secondarily emitted fluorescent light is used to identify chemical compounds.
- spectrofluorometer — an instrument in which the spectrum of secondarily emitted fluorescent light is used to identify chemical compounds.
- subatomic particle — physics:
- subject complement — a word or a group of words, usually functioning as an adjective or noun, that is used in the predicate following a copula and describes or is identified with the subject of the sentence, as sleepy in The travelers became sleepy.
- super giant slalom — a slalom race in which the course is longer and has more widely spaced gates than in a giant slalom.
- super middleweight — a boxer weighing up to 168 pounds (75.6 kg), between middleweight and light heavyweight.
- temporal summation — the act or process of summing.
- unit magnetic pole — the unit of magnetic pole strength equal to the strength of a magnetic pole that repels a similar pole with a force of one dyne, the two poles being placed in a vacuum and separated by a distance of one centimeter.
- up someone's alley — suited to someone's tastes or abilities
- upper klamath lake — See under Klamath Lakes.
- upper middle class — wealthy, highly-educated people
- white trumpet lily — a lily, Lilium longiflorum, of Japan, having fragrant, pure white, trumpet-shaped flowers nearly 7 inches (18 cm) in length.