Etymology
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stabilizer (n.)

1909 in aeronautical sense, agent noun from stabilize (v.).

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Definitions of stabilizer

stabilizer (n.)
a chemical that is added to a solution or mixture or suspension to maintain it in a stable or unchanging state;
stabilizer (n.)
airfoil consisting of a device for stabilizing an aircraft;
stabilizer (n.)
a device for making something stable;
Synonyms: stabiliser
From wordnet.princeton.edu