tropic的词源
英文词源
- tropic
- tropic: [14] The etymological notion underlying the word tropic is of ‘turning’, and the reason for its application to the hot regions of the world is that the two lines of latitude which bound them (the tropic of Cancer and the tropic of Capricorn) mark the points at which the sun reaches its zenith at the solstices and then ‘turns’ back. The word comes via Latin tropicus from Greek tropikós, a derivative of tropé ‘turning’ (source also of English trophy and related to the second syllable of contrive).
=> contrive, trophy, troubadour - tropic (n.)
- late 14c., "either of the two circles in the celestial sphere which describe the northernmost and southernmost points of the ecliptic," from Late Latin tropicus "of or pertaining to the solstice" (as a noun, "one of the tropics"), from Latin tropicus "pertaining to a turn," from Greek tropikos "of or pertaining to a turn or change; of or pertaining to the solstice" (as a noun, "the solstice," short for tropikos kyklos), from trope "a turning" (see trope).
The notion is of the point at which the sun "turns back" after reaching its northernmost or southernmost point in the sky. Extended 1520s to the corresponding latitudes on the earth's surface (23 degrees 28 minutes north and south); meaning "region between the tropics of Cancer and Capricorn" is from 1837.
中文词源
tropic 源于希腊词 tropikos。实际上它和trohpy （奖品，战利品）一样，同是出自希腊根词trop'turn'（转向，转动）。用tropic 来指“回归线”是因为回归线是太阳所能到达的极限位置，太阳到达此处，不是转向南去，就是转向北去。北回归线英语说Tropic of Cancer,南回归线英语说Tropic of Capricorn。tropic 的复数形式，即tropics,则被用以指现回归线和北回归线之间的地带，即“热带”。英语中有一个修辞学术语trope（转义，比喻）其终极词源也是希腊词根trope。
该词的英语词源请访问找单词词源英文版：tropic 词源，tropic 含义。
来自拉丁语 tropicus,夏至的，回归线的，来自希腊语 tropikos kyklos,旋转圈，回归线圈，来 自 trope,转向，旋转，词源同 turn,trope,kyklos,圈，词源同 cycle.引申词义热带，热带地区， 即太阳的直射点最远可以到达的区域。
来自拉丁语 tropicus,夏至的，回归线的，来自希腊语 tropikos kyklos,旋转圈，回归线圈，来 自 trope,转向，旋转，词源同 turn,trope,kyklos,圈，词源同 cycle.引申词义热带，热带地区， 即太阳的直射点最远可以到达的区域。
