An Etymological Dictionary of Astronomy and Astrophysics

1. A large piece of thick cloth for use as a bed covering, animal covering, etc, enabling a person or animal to retain natural body heat.
   

2. Any extended covering or layer (Dictionary.com).
   → blanketed model, → blanketing, → blanketing effect, → line blanketing, → line-blanketed model, → unblanketed model, → wind blanketing.

Etymology (EN): From M.E., from O.Fr. blanchet, diminutive of blanc “white; white cloth.”

Etymology (PE): Patu “blanket; a kind of woolen cloth,” Kermâni dialect poto “wollen; woolly;” cf. Skt. patta- “cloth, colored or fine cloth.”