Crumb

Part of speech: noun (n.)

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.

Part of speech: verb (v.)

To break into crumbs or small pieces with the fingers; as, to crumb bread. [Written also crum.]