Dictionary:

tor

  (tôr)

1. A high rock or pile of rocks on the top of a hill.
2. A rocky peak or hill.

[Middle English, from Old English torr, probably of Celtic origin.]

(The Onion Router) The largest implementation of onion routing, which is a method for transmitting data anonymously over the Internet. Run by volunteers, there are approximately a thousand Tor proxy servers on the Internet that provide the routing paths. Tor can be used by any TCP application that supports a SOCKS proxy server. In addition, there are Firefox bundles that include Tor and a modified Firefox application. For more information, visit www.torproject.org. See onion routing.

[Etymology: E. Torricelli; Italy 1608-47] pressure For gases, particularly the atmosphere; designed to equate with the millimetre of mercury (see head of liquid) but to have a precise value for the standard atmosphere, it is thus defined as ¹⁰¹³²⁵/₇₆₀ Pa = 13.585 53~ Pa. An SI-deprecated unit. (The spelling tor was used briefly for the pascal itself.)

An upstanding mass of rocks or boulders which rises above the gentler slopes which surround it. Tors are thought to have been formed by frost shattering in periglacial conditions. This theory is disputed by those who maintain that tors form underground during the deep weathering typical of tropical areas. In this case, the tors are first formed before the overburden is eroded away to reveal the boulders. According to these theories tors are examples of relict landforms. Tors are found on granites from Dartmooor, UK, to the Asir Highlands of Saudi Arabia.