humor
nounMoisture; but the word is chiefly used to express the moisture or fluids of animal bodies, as the humors of the eye. But more generally the word is used to express a fluid in its morbid or vitiated state. Hence, in popular speech, we often hear it said, the blood is full of humors. But the expression is not technical nor correct. Aqueous humor of the eye, a transparent fluid, occupying the space between the crystalline lens and the cornea, both before and behind the pupil. Crystalline humor or lens, a small transparent solid body, of a softish consistence, occupying a middle position in the eye, between the aqueous and vitreous humors, and directly behind the pupil. It is of a lenticular form, or with double convex surfaces, and is the principal instrument in refracting the rays of light, so as to form an image on the retina. Vitreous humor of the eye, a fluid contained in the minute cells of a transparent membrane, occupying the greater part of the cavity of the eye, and all the space between the crystalline and the retina.