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ROD. A measure sixteen feet and a half long; a perch.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
Then compress the insulation with a straightedge and cut with a utility knife.
So I clamped a straightedge across the cabinet side to guide the cut.
The simplest virtual fixture acts like a virtual straightedge, helping operators move the robot in a straight line.
Since early history geometrical constructions using a straightedge and a compass have occupied mathematicians, and in particular geometricians.
Many aspects of the plot, like the straightedge lifestyle, may be unfamiliar to teen readers.
"The emphasis in those days was that the whole band was what they called 'straightedge' [well-behaved].
Parrino's drawing (1987), portrays a rectangle likely made using a straightedge, with the vertical lines longer than the horizontal.
Using a 12-foot-long straightedge, engineers confirmed that the pavement surface on that lane deviated by as much as seven-sixteenths of an inch, enough to draw plenty of motorist gripes.
Clamp a straightedge along marked line, holding door and offcuts in position so door doesn't drop when you finish your cut.
The students noted that Steiner's proof was comparable to the solution of their problem (the proof of which is given below) and thus were stimulated to continue researching the use of the Steiner theorem for the trapezium, which ultimately led to an interest in general geometric constructions according to the rules of ancient Greek mathematics, and building geometric figures using a straightedge only.
If it's a flattop gas block, I just lay a straightedge on top and align it with the flattop upper receiver.
Within minutes I was able to finalize calculations with much greater accuracy than when manually inches to the map scale using my straightedge ruler.