Definition of autoclave noun from the Oxford Advanced Learner's Dictionary

 

autoclave

 noun
noun
BrE BrE//ˈɔːtəʊkleɪv//
 
, BrE//ˈɔːtəkleɪv//
 
; NAmE NAmE//ˈɔːtoʊkleɪv//
 
 
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a strong closed container, used for processes that involve high temperatures or pressure Word Origin late 19th cent.: from French, from auto- ‘self’ + Latin clavus ‘nail’ or clavis ‘key’ (so named because it is self-fastening).
See the Oxford Advanced American Dictionary entry: autoclave