apatite calculus
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Calculus — A stone, as in the urinary tract. Also, the calcium salt deposits on the teeth. The word calculus in Latin means a pebble. Pebbles were once used for counting, from which came the mathematical field of calculus. A urinary calculus is a pebble in… … Medical dictionary
Whitlockite — Infobox mineral name = Whitlockite category = Phosphate Mineral boxwidth = boxbgcolor = imagesize = caption = formula = molweight = 1,071.45 gm color = Colorless, gray white habit = massive to tabular system = Trigonal twinning = cleavage = None… … Wikipedia
dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or … Universalium
Kidney stone — Classification and external resources … Wikipedia
scale — 1. A standardized test for measuring psychological, personality, or behavioral characteristics. SEE ALSO: score, test. 2. SYN: squama. 3. A small thin plate of horny epithelium, resembling a fish s., cast off from the skin … Medical dictionary
