cord

Origin: corde, from Latin chorda 'string', from Greek chorde]

Cord or CORD may refer to:

• Cord (unit), a unit of measurement for firewood and pulpwood used in North America →一根柴火
• Electrical cable, in electronics
• Extension cord
• Power cord
• String (structure) made of multiple strands twisted together or thin rope
• Chronic obstructive respiratory disease or CORD, an alternate name for chronic obstructive pulmonary disease [慢性阻塞性肺疾病]
• Mycelial cord, a structure, used by fungi to transfer nutrients over larger distances
• Spinal cord 脊索
• Umbilical cord [脐带], a tube that connects a developing embryo or fetus to its placenta →电源线
• Cord (sewing), a decorative trim made of multiple strands of yarn twisted together
• Cord, a short form for the textile type Corduroy [灯芯绒]

An extension cord (US), power extender, drop cord, or extension lead (UK) is a length of flexible electrical power cable (flex) with a plug on one end and one or more sockets on the other end (usually of the same type as the plug). The term usually refers to mains (household AC) extensions but is also used to refer to extensions for other types of cabling. If the plug and power outlet are of different types, the term "adapter cord" may be used. Most extension cords range from around two to thirty feet in length although they are made up to 300 feet in length.

Extension cords come in various colors, lengths, thicknesses and service duties. In general, the more power needed by the appliance, the thicker the cord needs be (meaning larger wires inside). Cords which will be used outdoors, in wet areas, around oils, or exposed to sunlight for long periods of time should be selected for such specific conditions. An extension reel is an extension lead that rolls up, usually into the socket end, which in some cases has more than one socket on it (often 2 or 4). Another type of extension reel hangs near the plug end and permits the user to draw the cord out by grasping the socket end.

A power strip is a block on the end of a power cable with a number of sockets (usually 3 or more), often arranged in a line. This term is also used to refer to the whole unit of a short extension cord terminating in a power strip.

A removable power cord is similar but much shorter, and is designed to connect an appliance to a mains outlet.

A power strip with power indicator and individual switches for each socket (UK):

六级/考研单词: cord, electron, multiple, strand, twist, chronic, alternate, sew, trim, textile, rigid, plug, socket, outlet, appliance, indoor, exposition, reel, seldom, grasp, terminate