[wheel bit]

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[= W =]

wheel n.

[from slang `big wheel' for a powerful person] A person who has an active [wheel bit]. "We need to find a wheel to unwedge the hung tape drives." (See [wedged], sense 1.) The traditional name of security group zero in [BSD] (to which the major system-internal users like [root] belong) is `wheel'. Some vendors have expanded on this usage, modifying Unix so that only members of group `wheel' can [go root].

Node:

[wheel bit]