(1) (n.) A portion of a primitive or picture, such as a line segment, sometimes called a polyline. In the GKS graphics library, a collection of picture data composed of primitive s and attribute s. See also structure .
(2) (n.) In ISDN , the expanded packet created when the transport control protocol ( TCP ) adds an information header to a packet of data for decoding by the TCP on the remote machine The segment is then passed to the network layer , which converts it to a datagram . It then goes to the data-link layer , which converts it to a frame .
(3) (n.) A varying-sized part of data swapped in memory.