英语词源字典 - 在线词源网站

thereon (adv.)[thereon 词源字典]: Old English þæron; see there + on. Similar formation in German daran.[thereon etymology, thereon origin, 英语词源]
Theresa: also Teresa, fem. proper name, from French Thérèse, from Latin Therasia, apparently from Greek Therasia, name of two volcanic islands, one near Sicily, one near Crete. In the top 50 most popular names for girls born in the U.S. from 1953 to 1969.
thereto (adv.): Old English þærto "to it, in that place, for that purpose, belonging to;" see there + to. Similar formation in Old Saxon tharto, Old High German darazuo, German dazu.
thereunder (adv.): Old English þærunder; see there + under. Similar formation in Old Frisian therunder, German darunter.
thereupon (adv.): late 12c., þer uppon; see there + upon.
therewith (adv.): c. 1200, "along with, in company with," from there + with. Old English þær wiþ meant "against, in exchange for." Similar formation in Swedish dervid, Danish derved.
thermal (adj.): 1756, "having to do with hot springs," from French thermal (Buffon), from Greek therme "heat, feverish heat," from PIE *gwher- "to heat, warm" (cognates: Latin fornax "an oven, kiln," formus "warm," Old English wearm; see warm (adj.)). Sense of "having to do with heat" is first recorded 1837. The noun meaning "rising current of relatively warm air" is recorded from 1933.
thermo-: before vowels therm-, word-forming element meaning "hot, heat, temperature," used in scientific and technical words, from comb. form of Greek thermos "hot, warm," therme "heat" (see thermal).
thermochemistry (n.): also thermo-chemistry, 1840, from thermo- + chemistry.
thermocline (n.): 1897, from thermo- + -cline, from Greek klinein "to slope" (see lean (v.)).
thermocouple (n.): also thermo-couple, 1862, from thermo-electric + couple (n.).
thermodynamic (adj.): 1849, from thermo- + dynamic (adj.).
thermodynamics (n.): theory of relationship between heat and mechanical energy, 1854, from thermodynamic (adj.); also see -ics. "The consideration of moving forces, though suggested by the form of the word, does not enter into the subject to any considerable extent" [Century Dictionary].
thermograph (n.): "automatic self-registering thermometer," 1881, from thermo- + -graph "instrument for recording; something written." Related: Thermographic.
thermography (n.): 1840, "method of writing which requires heat to develop the characters," from thermo- + -graphy.
thermometer (n.): 1630s, from French thermomètre (1620s), coined by Jesuit Father Jean Leuréchon from Greek thermos "hot" (see thermal) + metron "measure" (see meter (n.2)). An earlier, Latinate form was thermoscopium (1610s). The earliest such device was Galileo's air-thermometer, invented c. 1597. The typical modern version, with mercury in glass, was invented by Fahrenheit in 1714. Related: Thermometric; thermometrical.
thermonuclear (adj.): 1938 with reference to stars, 1953 of weapons (technically only to describe the hydrogen bomb), from thermo- + nuclear.
thermoplastic (adj.): 1870, see thermo- + plastic (adj.). As a noun from 1929.
Thermopylae: narrow land passage along the Malian Gulf in ancient Greece, from Greek thermos "hot" (see thermal) + pylai, plural of pyle "gate; mountain pass, entrance into a region" (see pylon). In reference to nearby hot sulfur springs. Often simply hai pylai "the gates." Figurative of heroic resistance against overwhelming numbers since the battle fought there between the Greeks and Persians in 480 B.C.E.
Thermos (n.): trademark registered in Britain 1907, invented by Sir James Dewar (patented 1904 but not named then), from Greek thermos "hot" (see thermal). Dewar built the first one in 1892, but it was first manufactured commercially in Germany in 1904, when two glass blowers formed Thermos GmbH. Supposedly the company sponsored a contest to name the thing, and a Munich resident won with a submission of Thermos.