Dr. Wilder claims to be the first person to recognize that the 'center of disturbance', center of a ridge pattern, is always where a volar pad exists. Wilder is also noted for the idea that ridges are ridge units fused together, a hypothesis which still remains unproven.
Tic-tac-toe is a game that is traditionally played by being drawn on paper, and it can be played on a computer or on a variety of media. History of Tic Tac Toe An early variation of the game was played in the Roman Empire, around the 1st century B.C.
Freebase(0.00 / 0 votes)Rate this definition: Tic-tac is a traditional method of signs used by bookmakers to communicate the odds of certain horses. Until the turn of the 21st Century it was a very common sight on racecourses in the UK, but with the advent of mobile technology it is now seldom seen.