Crumb

Crumb, v. t. [imp. & p. p. Crumbed (kr?md); p. pr. & vb. n. Crumbing (kr?m"?ng).] To break into crumbs or small pieces with the fingers; as, to crumb bread. [Written also crum.]

Crumb (krŭm), n. [AS. cruma, akin to D. kruim, G. krume; cf. G. krauen to scratch, claw.] [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.