2. (Naut.) One of the principal transverse timbers of the
stern, bolted to the sternpost and giving shape to the
stern structure; -- called also {transsummer}.
3. (Gun.) The piece of wood or iron connecting the cheeks of
some gun carriages.
4. (Surg.) The vane of a cross-staff. --Chambers.
5. (Railroad) One of the crossbeams connecting the side
frames of a truck with each other.
{Transom knees} (Shipbuilding), knees bolted to the transoms
and after timbers.
{Transom window}. (Arch.)
(a) A window divided horizontally by a transom or
transoms.
(b) A window over a door, with a transom between.