Knoopn.
/nuːp//knuːp/ Used attributively with reference to an indentation test devised by Knoop, in which hardness is measured by the size of the indentation produced in a substance by a pyramidal diamond indenter of specified shape under a known load.
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1940 Metals & Alloys Sept. 292/1 The article is a description of the Knoop Indenter, a new instrument for determining the micro-hardness of thin layers of metals.
1945 Amer. Mineralogist 30 595 The Knoop hardness of gypsum is approximately 32 to 45 or more, depending on orientation.
1961 E. N. Cameron Ore Microsc. iv. 75 The Knoop hardness (KV) is given by the formula KV (in kg/mm2) = 14230 × P/l2 where P is the test load in grams, and l is the long diagonal of the indentation in 0·001 mm.
1971 Nature 14 Nov. 661/1 A study..on anisotropy in the hardness of crystals using the Knoop indenter.
1971 Brit. Jrnl. Nutrition 26 234 The Knoop test of hardness..was applied to human nails.
This entry has not yet been fully updated (first published 1976; most recently modified version published online September 2018).
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n.1940- matchbox bean
- matchbox house
- matchbox label
- matchbox maker
- matchbox skirt
- matchboxes
- matchboy
- matchbroker
- matchcloth
- matchcoat
- matchcock
- matchcord
- matchday
- matched
- matched boarding
- matched control
- matched control group
- matched dissolve
- matched guise
- matrix organization
- matrix printer
- matrix product
- matrix sentence
- matrix vase
- matrix-encircled