| 单词 | parallactical |
| 释义 | parallactical in British English (ˌpærəˈlæktɪkəl) adjective an obsolete word for parallactic parallax in British English (ˈpærəˌlæks) noun 1. an apparent change in the position of an object resulting from a change in position of the observer 2. astronomy the angle subtended at a celestial body, esp a star, by the radius of the earth's orbit. Annual or heliocentric parallax is the apparent displacement of a nearby star resulting from its observation from the earth. Diurnal or geocentric parallax results from the observation of a planet, the sun, or the moon from the surface of the earth Derived forms parallactic (ˌpærəˈlæktɪk) adjective parallactically (ˌparalˈlactically) adverb Word origin C17: via French from New Latin parallaxis, from Greek: change, from parallassein to change, from para-1 + allassein to alter |
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