- gyroscopic (adj.)
- 1871, from gyroscope + -ic. Related: Gyroscopically.
- gyrostat (n.)
- 1879, from gyro- + Greek statos "placed, standing," from PIE root *sta- (see stet).
- gyrostatics (n.)
- branch of dynamics dealing with rotating bodies, 1883, from gyrostatic (1879); see gyrostat + -ics.
- gyrus (n.)
- convolution between grooves, 1842, from Latin gyrus "circle, circuit, career," from Greek gyros "ring, circle" (see gyre).