Definition of prefocus in English:

prefocus

Line breaks: pre|focus
Pronunciation: /priːˈfəʊkəs
 
/

adjective

Relating to or denoting a light bulb which is designed so that its beam is focused automatically when it is fitted inside a lamp, especially a vehicle headlamp.

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Word of the day salmanazar
Pronunciation: ˌsalməˈnazər
noun
a wine bottle twelve times the standard size...