| 释义 |
elon·ga·tion
I. \(ˌ)ēˌlȯŋˈgāshən, ə̇ˌ- also -läŋ-\ noun
(-s)
Etymology: Middle English elongacioun, from Medieval Latin elongation-, elongatio, from Late Latin elongatus (past participle of elongare to withdraw) + Latin -ion-, -io -ion
1.
a. : the angular distance of a celestial body from another around which it revolves or from a particular point in the sky
< the elongation of a planet from the sun >
< the elongation of an eclipsing variable >
— see greatest elongation
b. : the daily extreme east or west position of a star with reference to the north celestial pole
< the elongations of the North Star >
2. obsolete : removal to a distance : remoteness
II. noun
(-s)
Etymology: elongate (I) + -ion
1.
a. : a lengthening or state of being lengthened : protraction, extension
< the elongation of a muscle under tension >
< elongation of the apex of a plant >
b. : the total deformation in the direction of load or per unit of length caused by a tensile force; sometimes : the maximum permanent stretch per unit of original length induced in a body by a force that causes it to break
2. : something that is elongated : prolongation, continuation
< the arm may be considered a specialized elongation of the earlier fin > |