reglet

noun

1. Architecture.
   1. a groove for guiding or holding a panel, window sash, etc.
   2. a narrow, flat molding; fillet.
2. Printing.
   1. a thin strip, usually of wood, less than type-high, used to produce a blank in or about a page of type.
   2. such strips collectively.

noun

1. a flat narrow architectural moulding
2. printing a strip of oiled wood used for spacing between lines of hot metal typeCompare lead 2 (def. 7)