0 a chemical substance containing aluminium used in dyeing (= changing the colour of something) and as an astringent (= substance that causes skin to tighten) -- 明礬，礬（含鋁的化學物質，作為染色劑或收斂劑）
The alum reacts with moisture in the air to break down the cellulose woodfibresthat give paper its structural strength.
Tissue used for light microscopy was mounted on gelatin-chrome alum-coated slides, cleared, coverslipped, and examined under a light microscope.
These sections are well exposed with three to four levels of stinkstone within a homogeneous succession of alum shale.
The sizerman gathered this paper and immersed it in an emulsion of hides, hoofs, tripe, and alum.
External walls of two glass skins contained, between them, a supersaturated solution of alum designed to harness phase change energy to maintain a constant internal climate.
A booster dose actually consists of half a cubic centimetre of alum precipitated toxoid or one cubic centimetre of toxoid antitoxin floccules.
The present laws on adulteration came from a cruder age when the treacherous trader mixed alum with his flour and sand with his brown sugar.
An ordnance survey of my division shows old alum mines there.
