Crumb n.   [Written also crum.]
 1. A small fragment or piece; especially, a small piece of bread or other food, broken or cut off.
    Desiring to be fed with the crumbs which fell from the rich man's table.   --Luke xvi. 21.
 2.  Fig.: A little; a bit; as, a crumb of comfort.
 3.  The soft part of bread.
 Dust unto dust, what must be, must;
 If you can't get crumb, you'd best eat crust.   --Old Song.
 Crumb brush, a brush for sweeping crumbs from a table.
 To a crum, with great exactness; completely.