Trepanning

Trepanning, an operation in surgery whereby portions of the skull are removed by means of an instrument called a trepan, which consists of a small cylindrical saw; resorted to in all operations on the brain.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Trenton * Trevelyan, Sir George Otto
Traviata
Trebizond
Trelawney, Edward John
Trelawney, Sir Jonathan
Trench, Richard Chevenix
Trenck, Baron von
Trent
Trent
Trent, Council of
Trenton
Trepanning
Trevelyan, Sir George Otto
Trèves
Tribunes
Trichinopoli
Tricolour
Trident
Trieste
Trim, Corporal
Trimurti
Trincomalee