Word: 
Words and phrases whose definition contains focal:  (25 results)
hub, speed
closeup lens, diopter, fisheye lens, focally, fresnel lens, f number, graticule, reticle, reticule, stop number
astigmia, hamartoma, stigmatism, wide-angle lens
accommodation, astigmatism, focal ratio
sensory epilepsy
jacksonian epilepsy, nonproliferation center
bureau of intelligence and research
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