PUMICE
\pjˈuːmɪs], \pjˈuːmɪs], \p_j_ˈuː_m_ɪ_s]\
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A very light porous volcanic scoria, usually of a gray color, the pores of which are capillary and parallel, giving it a fibrous structure. It is supposed to be produced by the disengagement of watery vapor without liquid or plastic lava. It is much used, esp. in the form of powder, for smoothing and polishing. Called also pumice stone.
By Oddity Software
By Daniel Lyons
By William Hand Browne, Samuel Stehman Haldeman
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Pumex.
By Robley Dunglison
Word of the day
Procollagen Proline Dioxygenase
- mixed-function oxygenase that catalyzes hydroxylation prolyl-glycyl-containing-peptide, usually in protocollagen, hydroxyprolylglycyl-peptide. The enzyme utilizes molecular oxygen with a concomitant oxidative decarboxylation of 2-oxoglutarate to succinate. EC 1.14.11.2.