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microinch
microinch n.
Brit. 
/ˈmʌɪkrəʊˌɪn(t)ʃ/
, /ˈmʌɪkrəʊˌɪn(t)ʃ/U.S. /ˈmaɪkroʊˌɪn(t)ʃ/
/ˈmaɪkroʊˌɪn(t)ʃ/ΚΠ
1941 E. V. Oberg & F. D. Jones Machinery's Handbk. (ed. 11) 1776 Assume that the quantities a, b, c, etc., equal the various profile measurements in micro-inches.
1993 New Scientist 24 Apr. 20/2 The patent claims are very broad, claiming legal monopoly on any recording head with a gap of less than about 15 microinches, or 0.4 micrometres.
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