English
halo car
From halo + car.
Proto-Indo-European *ḱr̥sós ‘vehicle’
…
Gaulish *karros ‘wagon’
Latin carrus ‘two-wheeled baggage wagon’
Anglo-Norman carre
Middle English carre ‘cart’
English car
Today it means
noun A flagship car model used to bring prestige to a mark or brand of autos, through the halo effect, by symbolic association with other car models and the brand itself.
Language periods are conventional ranges, not dates for this word.
Etymograph / halo car