Definition
A group of flight instruments that use a spinning rotor (a gyro) to sense and display the airplane's attitude, heading, and rate of turn. The three primary gyroscopic instruments in most general aviation airplanes are the attitude indicator, the heading indicator, and the turn coordinator (or turn-and-slip indicator). The gyros are driven either by engine-supplied vacuum/pressure or by electrical power, depending on the airplane.
Plain English
Cockpit instruments that work by spinning a small wheel inside them. Once the wheel is spinning fast, it stays steady in space, and the instrument uses that steadiness to show how the airplane is banking, pitching, turning, and which direction it's pointing.
Context Anchor
You encounter this term during the before-takeoff check, when confirming that instruments such as the attitude indicator, heading indicator, and turn indicator are working normally before flight.
Derivation
From the Greek 'gyros' meaning 'circle' or 'turn.' A gyroscope is literally a 'turn-watcher' — a spinning wheel whose steadiness in space lets it detect rotation. The name fits because these instruments rely entirely on that spinning behavior to do their job.
Why Pilots Care
They supply continuous attitude and heading data when visual references are lost, forming the foundation for safe instrument flight and recovery from unusual attitudes.
Analogy
A spinning top tends to stay steady while it spins. A gyroscopic instrument uses that same steady-spinning behavior to help show how the airplane is moving around it.
Intuition Check
Do not read gyroscopic instruments as instruments used to measure a gyroscope. In aviation, they are flight instruments that use gyroscopic behavior to show useful airplane information.
Example Sentence 1
During the before-takeoff check, the pilot verified that the gyroscopic instruments had spun up and were showing steady, correct indications.
Example Sentence 2
In instrument meteorological conditions the pilot relied on the gyroscopic instruments to maintain level flight when the horizon disappeared.