English Explanatory Dictionary

trunnion

English dictionary entry

Meanings

noun
  1. One of the short stubby bearings on either side of a cannon; a pintle.
  2. A similar rotational bearing comprising a rotating arc or ring sliding in the groove of a stationary arc, used in machinery to allow a workpiece to be moved relative to a fixed tool.
  3. A shaft, held by a bearing, at each end or side of a rotatable object.
  4. A similar rotational bearing used in automotive suspensions.

Pronunciation

/ˈtɹʌn.jən/

Word forms

trunnion trunnions trunion

Etymology

From French trognon (“core, stump”).

Derived words

trunnion plate
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