11-letter words containing foc
- autofocuses — Third-person singular simple present indicative form of autofocus.
- coude-focus — a telescope in which light from the primary mirror is reflected along the polar axis to additional mirrors, and in which the focus (coudé focus) is independent of the telescope's motion, permitting the use of heavy instruments without disturbing the delicate balance of the telescope.
- focal depth — lens: distance of sharp focus
- focal plane — a plane through a focal point and normal to the axis of a lens, mirror, or other optical system. Compare principal plane.
- focal point — Also called principal focus. Optics. either of two points on the axis of a mirror, lens, or other optical system, one point being such that rays diverging from it are deviated parallel to the axis upon refraction or reflection by the system and the other point being such that rays parallel to the axis of the system converge to the point upon refraction or reflection by the system.
- focal ratio — f-number.
- focus group — a representative group of people questioned together about their opinions on political issues, consumer products, etc.
- locofocoism — the doctrines of the Locofocos.
- multifocals — multifocal spectacles
- parfocality — the quality of being parfocal
- parfocalize — to make parfocal
- prime focus — the focal point of the objective lens or primary mirror of a telescope
- refocillate — to refresh, revive, give new life
- suffocation — to kill by preventing the access of air to the blood through the lungs or analogous organs, as gills; strangle.
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