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.

Definition of prefocus in:

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Word of the day dinkum
Pronunciation: ˈdɪŋkəm
adjective
(of an article or person) genuine, honest, true