18-letter words containing h, e, m, i, t, r
- thermoluminescence — phosphorescence produced by the heating of a substance.
- third man argument — (in the philosophy of Aristotle) the argument against the existence of Platonic Forms that since the Form of Man is itself a perfect man, a further form (the "third" man) would be required to explain this, and so ad infinitum
- thought experiment — Physics. a demonstration or calculation that is based on the postulates of a theory, as relativity, and that demonstrates or clarifies the consequences of the postulates.
- three-quarter time — the meter of a musical composition having a time signature of 3/4 and three quarter notes or their equivalent in each measure.
- to raise the alarm — If you raise the alarm or sound the alarm, you warn people of danger.
- triarylmethane dye — any of the class of dyes containing three aryl groups attached to a central carbon atom: used chiefly for dyeing cotton, wool, and silk.
- urban homesteading — homesteading (def 2).
- western hemisphere — the western part of the terrestrial globe, including North and South America, their islands, and the surrounding waters.
- white man's burden — the alleged duty of white colonizers to care for nonwhite indigenous subjects in their colonial possessions.
- white trumpet lily — a lily, Lilium longiflorum, of Japan, having fragrant, pure white, trumpet-shaped flowers nearly 7 inches (18 cm) in length.
- white-collar crime — any of various crimes, as embezzlement, fraud, or stealing office equipment, committed by business or professional people while working at their occupations.
- whittaker chambers — Robert, 1802–71, Scottish publisher and editor.
- writ of attachment — a document by which a court orders the seizing of property in order to ensure satisfaction of a judgement