plural of stagnation point

Any of a number of metallic rods for holding a stair carpet in place.

plural of stair rod

plural of staff surgeon

A navy surgeon of senior grade.

(heraldry) A knotted stick with short stumps of branches on each side.

(rail transport, historical) A block system in use on single-line railways, in which the stationmaster gives the driver a staff authorizing the driver to proceed over a given portion of track.

A Jedburgh staff.

plural of staff system

(algebra) Said of a group acting on a set, and with respect to an element of that set: the subgroup of the given group whose action on the given element of the set that the group acts on leaves that element fixed.