- A tiny crack visible on the surface of material.
Aviation dictionary. 2014.
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hairline crack — A tiny stress crack which forms due to strains in the material or extreme temperature differences; as opposed to crazing, a single crack of this type will often occur alone … Dictionary of automotive terms
crack — crack1 [ kræk ] verb ** ▸ 1 break so line appears ▸ 2 break something open ▸ 3 make short loud noise ▸ 4 hit part of body hard ▸ 5 solve problem/mystery ▸ 6 lose control of yourself ▸ 7 when voice shakes ▸ + PHRASES 1. ) transitive to damage… … Usage of the words and phrases in modern English
crack — I UK [kræk] / US verb Word forms crack : present tense I/you/we/they crack he/she/it cracks present participle cracking past tense cracked past participle cracked ** 1) a) [transitive] to damage something so that a line or long narrow hole… … English dictionary
hairline — [[t]he͟ə(r)laɪn[/t]] hairlines 1) N COUNT: usu sing, oft poss N Your hairline is the edge of the area where your hair grows on your head. Joanne had a small dark birthmark near her hairline... His hairline had receded slightly over the years. 2)… … English dictionary
hairline — hair|line [ˈheəlaın US ˈher ] n 1.) the line around your head, especially at the front, where your hair starts growing ▪ He had put on weight, and his hairline was beginning to recede. 2.) a hairline crack/fracture a very thin crack ▪ a hairline… … Dictionary of contemporary English
hairline — noun (C) 1 the line around your head, especially at the front, where your hair starts growing: a receding hairline 2 a hairline crack/fracture a very thin crack: a hairline fracture in a bone … Longman dictionary of contemporary English
hairline — I UK [ˈheə(r)ˌlaɪn] / US [ˈherˌlaɪn] noun [countable] Word forms hairline : singular hairline plural hairlines the line at the top of your forehead where your hair begins a receding hairline (= higher than it used to be, because some hair has… … English dictionary
hairline — hair|line1 [ her,laın ] noun count the line at the top of your forehead where your hair begins: a receding hairline (=higher than it used to be, because some hair has fallen out): treatment for men with receding hairlines hairline hair|line 2 [… … Usage of the words and phrases in modern English
hairline — 1. noun /ˈhɛrˌlaɪn/ a) the line along ones forehead where hair starts growing. Its just a receding hairline its not like youre going bald. b) the thinnest line that can be drawn using some graphics software 2 … Wiktionary
hairline — [ˈheəˌlaɪn] noun [C] I the line at the top of your forehead where your hair begins II adj hairline [ˈheəˌlaɪn] a hairline crack is very narrow … Dictionary for writing and speaking English