1) Brick workers 2) Bricklayers 3) Builders of a sort 4) Certain fraternity members 5) Fraternal group 6) Free people 7) Hod workers 8) Layers around new houses 9) Layers at work 10) Layers of bricks 11) Layers of stone 12) Members of a secret order 13) Members of Grand Lodges 14) Mortarboard users 1) Bricklayers 
is a hydrated lime used in mortar.