अर्थ : A transparent optical device used to converge or diverge transmitted light and to form images.

अर्थ : Genus of small erect or climbing herbs with pinnate leaves and small inconspicuous white flowers and small flattened pods: lentils.

अर्थ : (metaphor) a channel through which something can be seen or understood.

अर्थ : Biconvex transparent body situated behind the iris in the eye. Its role (along with the cornea) is to focus light on the retina.

अर्थ : Electronic equipment that uses a magnetic or electric field in order to focus a beam of electrons.