lightening
 照明; 發光


 light·en·ing /ˈlaɪtṇɪŋ, ˈlaɪtnɪŋ/ 名詞
 胎兒下降感


 Light·en v. i. [imp. & p. p. Lightened p. pr. & vb. n. Lightening.]
 1. To burst forth or dart, as lightning; to shine with, or like, lightning; to display a flash or flashes of lightning; to flash.
 This dreadful night,
 That thunders, lightens, opens graves, and roars
 As doth the lion.   --Shak.
 2. To grow lighter; to become less dark or lowering; to brighten; to clear, as the sky.


 lightening
      n 1: descent of the uterus into the pelvic cavity that occurs
           late in pregnancy; the fetus is said to have dropped
      2: changing to a lighter color [syn: whitening]