Webster's 1828 Dictionary
POSSET
n.[L. posca.] Milk curdled with wine or other liquor.
POSSET
v.t.To curdle; to turn.
Webster's 1913 Dictionary
POSSET
Pos "set, n. Etym: [W. posel curdled milk, posset. ]
Defn: A beverage composed of hot milk curdled by some strong infusion, as by wine, etc. , -- much in favor formerly. "I have drugged their posset. " Shak.
POSSET
Pos "set, v. t. [imp. & p. p. Posseted; p. pr. & vb. n. Posseting.]
1. To curdle; to turn, as milk; to coagulate; as, to posset the blood. [Obs. ] Shak.
2. To treat with possets; to pamper. [R.] "She was cosseted and posseted." O. W. Holmes.
New American Oxford Dictionary
posset
pos set |ˈpäsət ˈpɑsət | ▶noun historical a drink made of hot milk curdled with ale, wine, or other alcoholic liquor and typically flavored with spices, drunk as a delicacy or as a remedy for colds. ORIGIN late Middle English: of unknown origin.
Oxford Dictionary
posset
posset |ˈpɒsɪt | ▶noun historical a drink made of hot milk curdled with ale, wine, or other alcohol and typically flavoured with spices. ▶verb ( possets, possetting, possetted ) [ no obj. ] (of a baby ) regurgitate curdled milk. ORIGIN late Middle English: of unknown origin. The verb is first recorded in English dialect in the late 19th cent.
The Wordsmith Dictionary