suckle

Short definition from Wiktionary

Noun

1. 1
   A teat.
2. 2
   An act of suckling

Verb

1. 1
   To give suck to; to nurse at the breast, udder, or dugs.
2. 2
   To nurse; to suck milk from a nursing mother.
3. 3
   To nurse from (a breast, nursing mother, etc.).