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bifacial
bifarious
biff
biffy
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bifidobacterium
bifilar
biflagellate
bifocal
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bifocal

bi·fo·cal [ bī fṓk'l, b fk'l ]


adjective 
Definition:
 
with two focal lengths: describes lenses with sections that have different focal lengths, especially in glasses for near and distant vision



plural noun bi·fo·cals 
Definition:
 
glasses for near and distant vision: a pair of glasses with bifocal lenses

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