Mites Affecting Humans. âMiteâ is a term commonly used to refer to a group of insect-like organisms, some of which bite or cause irritation to humans. While some mites parasitize animals, including man, others are scavengers, some feed on plants, and many prey on insects and other arthropods.ites Affecting Humans. âMiteâ is a term commonly used to refer to a group of insect-like organisms, some of which bite or cause irritation to humans. While some mites parasitize animals, including man, others are scavengers, some feed on plants, and many prey on insects and other arthropods.
cog railway. n. A railway designed to operate on steep slopes and having a locomotive with a center cogwheel that engages with a cogged center rail to provide traction. Also called rack railway. cog railway. (ËkÉÉ¡ËweÉª) or.
For the physical signals themselves, see railway signal. The freight train (right) is waiting at a red signal while the passenger train (left) crosses its path at a junction. Railway signalling is a system used to direct railway traffic and keep trains clear of each other at all times. Trains move on fixed rails, making them uniquely susceptible to collision.