n. A trade-name of a special type of derrick-boom. It may be an I-beam, the lower flange of which serves as a track for a traveling hoisting-carriage, or a hollow beam having a track suspended from the under side; and it can be used as a derrick-boom, or may be suspended from a gallows-frame or from another derrick. It employs a traveling hoisting-carriage resembling one used in a cableway.n. In machinery, in general, any carrying device, as one used for transporting coal from one vessel to another.n. One who or that which transports or removes.