gyroscope

n device containing a wheel which, when its spins fast, always maintains the same orientation regardless of any movement of the supporting structure, often used in ships' stabilizers 陀螺仪; 回转仪.

guzzle, guzzler, gybe (US jibe), gym, gym-slip (also slip), gymkhana, gymnasium, gymnast, gymnastic, gymnastics, gynaecological (US gynecological), gynaecologist (US gynecologist), gynaecology (US gynecology), gyp, gypsum, gypsy, gypsy (also gipsy, Gypsy), gyrate, gyration, gyro, H, h'm, H, h, H-bomb, ha, ha-ha, habeas corpus, haberdasher, haberdashery, habit, habit-forming, habitability, habitable, habitant, habitat, habitation, habitual, habitually, habituate, habituation,