Wikipedia
In railroad terminology, a steeplecab is a style or design of electric locomotive; the term is rarely if ever used for other forms of power. The name originated in North America and has been used in Britain as well as the alternative camelback.
A steeplecab design has a central (or nearly central) driving cab area which may include a full-height area in between for electrical equipment. On both ends, connected to the full-height cab areas, lower (usually sloping) "noses" contain other equipment, especially noisy equipment such as air compressors not desired within the cab area. When overhead lines are used for power transmission, the cab roof usually supports the equipment to collect the power (either by pantograph(s) bow collector(s) or trolley pole(s)), although on some early designs (such as the North Eastern Railways Electric number 1 -- later known as an "ES1") a bow collector might be mounted on one of the bonnets (or "nose hoods") instead.