Acorus
a genus of plants, order orontiaceæ. The acorus calamus, or sweet flag, a member of this genus, is the only native aromatic plant of northern climates. It blossoms during the months of May and June.
ACOUSTICS. See SOUND.
ACQUI (ak'wē), a district of north Italy, province of Alessandria, on the N. side of the Ligurian Apennines.
Area, 445 square miles. Productions, corn and fruit. Silk worms are reared as a branch of industry.
Acqui, its capital on the Bormida, 18 miles S. S. W. of Alessandria. It has commodious sulphur baths. Pop. about 18,000.