Wiktionary
gullwing
a. (context of a door, flap, etc. English) Opening upward, with the angled profile characteristic of a gull's wing.
Usage examples of "gullwing".
Yolande said casually, as the gullwing doors of the aircar soughed open.
Their car floated by the curb, motionless and a quarter meter above the roadway as the gullwing doors folded up.