Definitions for back-staff
back-staff
back staff
Back-Staff is a 10 letter English word.
It's valid Scrabble word worth 12 points.
It's valid Words with friends word worth 14 points.
You can make 190 anagrams from letters in back-staff (-aabcffkst).
Definitions for back-staff
noun
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an obsolete instrument for determining the altitude of the sun by facing away from the sun, sighting upon the horizon, adjusting a cursor until its shadow falls upon the sight through which the horizon appears, and measuring the resulting arc.
Origin of back-staff
First recorded in 1620-30