GILL n. 2 definitions
Branchial clefts. See under Branchial. -- Gill cover, Gill lid. See Operculum. -- Gill frame, or Gill head (Flax Manuf.), a spreader; a machine for subjecting flax to the action of gills. Knight. -- Gill net, a flat net so suspended in the water that its meshes allow the heads of fish to pass, but catch in the gill…
GIRDER n.
ntal beam to span an opening or carry weight, such as ends of floor beams, etc.; hence, a framed or built-up member discharging the same office, technically called a compound girder. See Illusts. of Frame, and Doubleframed floor, under Double. Bowstring girder, Box girder, etc. See under Bowstring, Box, etc. -- Girder…