A husk is the fibrous covering of a seed or a fruit that's usually removed before you eat it. To make white rice, the husk is removed from the plant, leaving behind a smooth grain.
When you hear the word husk, you may think of the thick leaves that cover an ear of corn. Any vegetable, legume, seed, or fruit with a protective covering has a husk, which is also called a hull or chaff. You can use this word as a verb, too: "Are you going to husk all that corn by yourself? It's almost time for dinner!" Some etymologists trace this word back to the Dutch huuskyn, "little house."