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focal meaning in English

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focal adjectif

focal◼◼◼((medicine) limited to a small area)
adjective
[UK: ˈfəʊk.l̩] [US: ˈfoʊk.l̩]

focaliser verbe

focus [focussed, focussing, focusses]◼◼◼(cause (rays of light, etc) to converge at a single point)
verb
[UK: ˈfəʊkəs] [US: ˈfoʊkəs]
We must focus. = Il nous faut nous focaliser.

confocal adjectif

confocal◼◼◼(Having the same foci)
adjective
[UK: kənfˈəʊkəl] [US: kənfˈoʊkəl]

distance focale nom {f}

focal length [focal lengths]◼◼◼(distance)
noun
[UK: ˈfəʊk.l̩ leŋθ] [US: ˈfoʊk.l̩ ˈleŋkθ]

lunettes varifocales nom {f pl}

varifocals(spectacles)
noun

matrifocale adjectif
{?}

matrifocal◼◼◼adjective

objectif à focale variable nom {m}

zoom lens(lens whose focal length can be rapidly changed)
noun
[UK: zuːm lenz] [US: ˈzuːm ˈlenz]

point focal nom {m}

focal point◼◼◼((optics) a focus; a point at which rays of light or other radiation converge)
noun
[UK: ˈfəʊk.l̩ pɔɪnt] [US: ˈfoʊk.l̩ ˈpɔɪnt]

se focaliser verbe

focus [focussed, focussing, focusses]◼◼◼(intransitive: to concentrate one's attention)
verb
[UK: ˈfəʊkəs] [US: ˈfoʊkəs]

varifocal adjectif

varifocal◼◼◼(having a variable focal length)
adjective
[UK: vˈɑːrɪfˌəʊkəl] [US: vˈɑːrrɪfˌoʊkəl]