Of, or relating to the eye or to vision.
Of, or relating to optics or optical instruments.
A lens or other part of an optical instrument that interacts with light.
A measuring device with a small window, attached to an upside-down bottle, used to dispense alcoholic drinks in a bar.
Of or pertaining to an ovum.
Having the shape of an oval.
A thing having such a shape, such as an arena.
In a projective plane, a set of points such that no three are collinear and there is a unique tangent line at each point.
An elongated round shape resembling an egg or ellipse.
A sports field, typically but not exclusively oval in shape.