CHEMOTAXIS; CHEMIOTAXIS n.
s 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.
CLACK n.
lack dish, a dish with a movable lid, formerly carried by beggars, who clacked the lid to attract notice. Shak. Clack door (Mining), removable cover of the opening through which access is had to a pump valve. -- Clack valve (Mach.), a valve; esp. one hinged at one edge, which, when raised from its seat, falls with a c…
COHESION n.
That from of attraction by which the particles of a body are united throughout the mass, whether like or unlike; -- distinguished from adhesion, which unites bodies by their adjacent surfaces. Solids and fluids differ in the degree of cohesion, which, being increased, turns a fluid into a solid. Arbuthnot.…