wind·chill 
/ˈwɪndˌtʃɪl/ noun
plural wind·chills /ˈwɪndˌtʃɪl/ noun chiefly US 1 [noncount] : the effect that wind has of making air feel colder than it actually is
▪ It's cold outside, and it feels even colder because of the windchill. —called also windchill factor 2 [count] : a temperature that shows how cold the air feels because of the wind
▪ Expect windchills in the 20s tonight.
▪ It's cold outside, and it feels even colder because of the windchill. —called also windchill factor
▪ Expect windchills in the 20s tonight.
