(biology, anatomy, embryology) The central loop of the alimentary canal of an embryo between the foregut and the hindgut, in humans and some other animals.

An electromechanical device which connects an input to one of a number of outputs according to how many electrical pulses it has received on its input.

A graduated glass tube, closed at one end, that is used for measuring the change in the volume of gases during a chemical reaction.

a binding agreement between New France and forty First Nations signed in 1701 that ended the Beaver Wars.