sick leave

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Paid absence from work allowed an employee because of sickness.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Paid absence from work specifically to recover from illness.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a leave of absence from work because of illness