| Title | isobar |
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| Text |
Merriam-Webster's Collegiate Dictionary iso·bar ETYMOLOGY International Scientific Vocabulary is- + -bar (from Greek baros weight); akin to Greek barys heavy — more at grieve DATE circa 1864 1. an imaginary line or a line on a map or chart connecting or marking places of equal barometric pressure 2. one of two or more atoms or elements having the same atomic weights or mass numbers but different atomic numbers [isobar 1] English Etymology isobar 1864, coined from Gk. isos "equal," + baros "weight," from barys"heavy" (see grave (adj.)). Oxford Advanced Learner's Dictionary-牛津双解-OALD7 isobar iso·bar / 5aisEbB:(r) / noun (technical 术语) a line on a weather map that joins places that have the same air pressure at a particular time (天气图上的)等压线 Webster's Third New International Dictionary, Unabridged iso·bar \ˈ ̷ ̷ ̷ ̷ at iso- +ˌbär\ nounEtymology: International Scientific Vocabulary is- + -bar (from Greek baros weight) — more at grieve 1. : an imaginary line or a line on a map or chart connecting or marking places on the surface of the earth where the height of the barometer reduced to sea level is the same either at a given time or for a certain period 2. a. also iso·bare \-ˌba(a)(ə)r\ : one of two or more atoms having practically the same atomic weights but different atomic numbers and hence different chemical properties < carbon 14 and ordinary nitrogen 14 are isobars > b. : one of two or more nuclides having the same mass numbers but different atomic numbers • iso·bar·ism \-ˌbäˌrizəm, -ˌba(a)ˌr-\ noun -s |
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