LEVIGATION
\lˌɛvɪɡˈe͡ɪʃən], \lˌɛvɪɡˈeɪʃən], \l_ˌɛ_v_ɪ_ɡ_ˈeɪ_ʃ_ə_n]\
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By William R. Warner
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An operation, by which bodies are reduced to very fine powder. It is performed by putting substances, already pulverized, into water; the coarser parts are not long in being deposited, whilst the finer molecules remain suspended in the water. The liquor is decanted into another vessel, and suffered to remain at rest, until the fine particles are collected at the bottom. The fluid part is then separated by decantation.
By Robley Dunglison
By Willam Alexander Newman Dorland