heater

n 1: heats water or supplies warmth to a room [syn: {warmer}]

2: a baseball thrown with maximum velocity; "he swung late on

the fastball"; "He showed the batters nothing but smoke"

[syn: {fastball}, {smoke}, {hummer}, {bullet}]

header

1. The portion of a {packet}, preceding the actual data,

containing source and destination addresses, error checking

and other fields.

2. The part of an {electronic mail} message or {news} article

that precedes the body of a message and contains, among other

things, the sender's name and e-mail address and the date and

time the message was sent.