Alternative form of time signal

plural of time-signal

plural of time signal

plural of signal box

A building, typically adjacent to or spanning a railway line, from where signals, points and (sometimes) level crossings are controlled. / The alarm-box of a police or fire-alarm system.

(biochemistry) A series of chemical reactions within a cell which start when a transmembrane protein comes into contact with a chemical signal, resulting in a second messenger being triggered.

(endocrinology) A type of cell signaling involving the release of a hormone from a nerve cell that has an effect on another cell.

The meaning of a railway signal

(rail transport) The visual appearance of a railway signal

plural of block signal