trim tab
Noun
Meaning
trim tab (plural trim tabs)
(aviation, nautical) A control surface set within or attached to a larger control surface that provides trim to obtain a desired attitude without constant inputs to the primary control surfaces (e.g., ailerons and rudders).
Examples
Death Gravestone (see trim tab Fuller died on July 1, 1983, 11 days before his 88th birthday.
The trim tab on the solar array makes small adjustments to the torque balance.