\ɐbsˈɔːpʃən lˈa͡ɪnz], \ɐbsˈɔːpʃən lˈaɪnz], \ɐ_b_s_ˈɔː_p_ʃ_ə_n l_ˈaɪ_n_z]\
Definitions of ABSORPTION LINES
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Numerous dark lines in the solar spectrum due to absorption by the solar atmosphere, and also by that of the earth; the phenomenon is due to the fact that rays passing from an incandescent body through a cooler medium are absorbed by elements in that medium which would give out the same rays if the medium were itself made incandescent.
By Stedman, Thomas Lathrop
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- waterlines to show level water should reach when the ship is properly loaded