SPIRIT-LEVEL
\spˈɪɹɪtlˈɛvə͡l], \spˈɪɹɪtlˈɛvəl], \s_p_ˈɪ_ɹ_ɪ_t_l_ˈɛ_v_əl]\
Definitions of SPIRIT-LEVEL
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A glass tube, whose axis is very slightly curved, nearly filled with spirit, for showing the true horizontal line by the central position of an air-bubble on its upper side.
By Henry Percy Smith
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n. An instrument for determining a level or laying an exact horizontal surface or line.
