CHEMISTRY n. 3 definitions
tion of the molecules, which depend upon variations of the number, kind, or mode of arrangement, of the constituent atoms. These atoms are not assumed to be indivisible, but merely the finest grade of subdivision hitherto attained. Chemistry deals with the changes in the composition and constitution of molecules. See A…
CHEMOTAXIS; CHEMIOTAXIS n.
ss exhibited by small free-swimming organisms, as bacteria, zoöspores of algæ, etc., to chemical substances held in solution. They may be attracted (positive chemotaxis) or repelled (negative chemotaxis). -- Chem`o*tac"tic (#), a. -- Chem`o*tac"tic*al*ly, adv.
CINEMATOGRAPH n. 2 definitions
her machines or devices producing moving pictorial effects. Other common names for the cinematograph are animatograph, biograph, bioscope, electrograph, electroscope, kinematograph, kinetoscope, veriscope, vitagraph, vitascope, zoögyroscope, zoöpraxiscope, etc.