| 释义 |
semidiameter
sem·i·di·am·e·ter S0252300 (sĕm′ē-dī-ăm′ĭ-tər, sĕm′ī-)n. The apparent radius of a celestial body when viewed as a disk from Earth.semidiameter (ˌsɛmɪdaɪˈæmɪtə) nthe apparent radius of a star or other celestial body when viewed from Earthsem•i•di•am•e•ter (ˌsɛm i daɪˈæm ɪ tər, ˌsɛm aɪ-)
n. half of a diameter. Thesaurus| Noun | 1. | semidiameter - the apparent radius of a celestial body when viewed as a disc from the earthradius, r - the length of a line segment between the center and circumference of a circle or sphere |
Translationssemidiameter
semidiameter (sem-ee-dÿ-am -ĕ-ter) Half the apparent diameter of a celestial body.semidiameter[¦sem·i·dī′am·əd·ər] (astronomy) Measured at the observer, half the angle subtended by the visible disk of a celestial body. semidiameter
Related to semidiameter: parallaxWords related to semidiameternoun the apparent radius of a celestial body when viewed as a disc from the earthRelated Words |