romer
Concise Oxford English Dictionary © 2008 Oxford University Press:
romer /ˈrəʊmə/
▶noun a small piece of plastic or card bearing perpendicularly aligned scales or (if transparent) a grid, used to determine the precise reference of a point within the grid printed on a map.
– origin 1930s: named after its British inventor Carrol Romer.
'romer' also found in these Oxford entries:
