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That branch of medical science which treats of the hygiene and diseases of children.

The science or art of punishment. [Written also poenology.]

The science of digestion.

ighest attainable state or degree of excellence; maturity; as, perfection in an art, in a science, or in a system; perfection in form or degree; fruits in perfection.

Of or pertaining to the science of vision; optical. [Obs.] Bacon.

The science or art of delineating objects according to the laws of perspective; the theory of perspective.

The scientific description of rocks; that department of science which investigates the constitution of rocks; petrology.

The department of science which is concerned with the mineralogical and chemical composition of rocks, and with their classification: lithology.

The science of preparing medicines.

The art or science which treats of lighthouses and signal lights.

The science of the relations between climate and periodic biological phenomena, as the migrations and breeding of birds, the flowering and fruiting of plants, etc. -- Phe`no*log"ic*al (#), a. -- Phe`no*log"ic*al*ly, adv. -- Phe*nol"o*gist (#), n.

The study of language, especially in a philosophical manner and as a science; the investigation of the laws of human speech, the relation of different tongues to one another, and historical development of languages; linguistic science.

The course of sciences read in the schools. Johnson.

The doctrine or science of sounds; especially those of the human voice; phonology.

The science which treats of vocal sounds. J. Peile.

The science or doctrine of the elementary sounds uttered by the human voice in speech, including the various distinctions, modifications, and combinations of tones; phonetics. Also, a treatise on sounds.

The science of motion; kinematics. [R.] Weisbach.

The science of light; -- a general term sometimes employed when optics is restricted to light as a producing vision. Knight.

The science which relates to the action of light on sensitive bodies in the production of pictures, the fixation of images, and the like.

The doctrine or science of light, explaining its nature and phenomena; optics.