roach

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A roll of hair brushed up from the forehead or temple.
• noun A hairstyle especially among certain Native American peoples in which the head is shaved except for a strip from front to back across the top.
• noun Nautical An outward curve in the leech of a fore-and-aft sail.
• transitive verb To brush (hair) in a roach.
• transitive verb To shave (the mane of a horse) to a short bristle.
• noun An edible freshwater cyprinid fish (Rutilus rutilus) of northern Europe.
• noun Any of various similar fishes, such as some North American freshwater sunfishes.
• noun A cockroach.
• noun Slang The butt of a marijuana cigarette.

from The Century Dictionary.

• To make hard like a rock.
• noun A rock.
• noun Refuse gritty stone.
• noun Nautical, a concave curve in the leech or foot of a square sail, to improve the fit of the sail.
• noun An upstanding curl or roll of hair over the forehead, like the roach of a sail.
• noun A rash, or eruption on the skin.
• To cause to stand up or arch; make projecting or convex: as, his hair was roached up over his forehead.
• To cut short so as to cause to stand up straight; hog: said of horses' manes.
• noun A common cyprinoid fish of Europe, Leuciscus rutilus.
• noun In the United States, one of many different fishes like or mistaken for the roach, as some sunfish of the genus Lepomis or Pomotis;
• noun the spot or lafayette
• noun the American chub, Semotilus atromaculatus.
• noun A cockroach.
• noun The redfin, Rutilus rutilus, a common European shiner or minnow of the family Cyprinidæ.
• noun In England, a shell limestone occurring at the top of the Portland Stone or Portlandian on the Isle of Portland.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) A cockroach.
• transitive verb To cause to arch.
• transitive verb To cut off, as a horse's mane, so that the part left shall stand upright.
• noun A European fresh-water fish of the Carp family (Leuciscus rutilus). It is silver-white, with a greenish back.
• noun An American chub (Semotilus bullaris); the fallfish.
• noun The redfin, or shiner.
• noun (Naut.) A convex curve or arch cut in the edge of a sail to prevent chafing, or to secure a better fit.
• noun perfectly sound.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A small freshwater fish in the carp family (Cyprinidae), Rutilus rutilus.
• noun US a cockroach.
• noun US, slang, smoking A butt of a marijuana cigarette.
• noun UK, slang, smoking The filter of a rolled cigarette or joint, made from card or paper.
• noun nautical An extra curve of material added to the leech edge of a sail to increase the sail area.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb cut the mane off (a horse)
• noun a roll of hair brushed back from the forehead
• noun street names for flunitrazepan
• noun European freshwater food fish having a greenish back
• noun any of numerous chiefly nocturnal insects; some are domestic pests
• verb comb (hair) into a roach
• noun the butt of a marijuana cigarette