||Dil`a*ta"tor (?), n. [NL. Cf. L. dilatator a propagator.] (Anat.) A muscle which dilates any part; a dilator.
Di*late" (?; 277), v. t. [imp. & p. p. Dilated (?); p. pr. & vb. n. Dilating (?).] [L. dilatare; either fr. di- = dis- + latus wide, not the same word as latus, used as p. p. of ferre to bear (see Latitude); or fr. dilatus, used as p. p. of differre to separate (see Delay, Tolerate, Differ, and cf. Dilatory): cf. F. dilater.] 1. To expand; to distend; to enlarge or extend in all directions; to swell; -- opposed to contract; as, the air dilates the lungs; air is dilated by increase of heat.