Aq"ua*tile (&?;), a. [L. aquatilis: cf. F. aquatile.] Inhabiting the water. [R.] Sir T. Browne.
{ A"qua*tint (&?;), A`qua*tin"ta (&?;), } n. [It. acquatinta dyed water; acqua (L. aqua) water + tinto, fem. tinta, dyed. See Tint.] A kind of etching in which spaces are bitten by the use of aqua fortis, by which an effect is produced resembling a drawing in water colors or India ink; also, the engraving produced by this method.
Aq"ue*duct (&?;), n. [F. aqueduc, OF. aqueduct (Cotgr.), fr. L. aquaeductus; aquae, gen. of aqua water + ductus a leading, ducere to lead. See Aqua, Duke.] 1. A conductor, conduit, or artificial channel for conveying water, especially one for supplying large cities with water.
The term is also applied to a structure (similar to the ancient aqueducts), for conveying a canal over a river or hollow; more properly called an aqueduct bridge.
2. (Anat.) A canal or passage; as, the aqueduct of Sylvius, a channel connecting the third and fourth ventricles of the brain.