ballast
121ballast resistor — noun An electrical resistor whose resistance varies with the current passing through it, and thus tends to maintain a constant current Syn: barretter …
122Ballast Office — See Old Trinity House …
123Ballast der Republik — (ostberl.) ironisch für den Palast der Republik. ?? auch Pallazo Prozzo …
124Ballast Efficacy Factor — The measure of the efficiency of fluorescent lamp ballasts. It is the relative light output divided by the power input …
125ballast resistor — /ˈbæləst rəˌzɪstə/ (say baluhst ruh.zistuh) noun an electronic control device, employing a resistor whose resistance increases with temperature, used as a current regulator …
126ballast tank — Tanks at the bottom or sides of a ship which are filled with seawater for ballasting purpose …
127ballast resistor — (BAL RES) A resistor constructed of a special type wire, the properties of which tend to increase or decrease the voltage in direct proportion to the heat of the wire …
128Track ballast — forms the trackbed upon which railroad ties (US) or railway sleepers (UK) are laid. It is packed between, below, and around the ties. It is used to facilitate drainage of water, to distribute the load from the railroad ties, and also to keep down …
