Another point which appears worth mentioning is the following; The foot – screws were of brass, the tribrach, into which they fitted, was made of aluminium for the sake of lightness.    From Wordnik.com.  [South: the story of Shackleton’s last expedition 1914–1917] Reference

The two metals have a different coefficient of expansion, and while the feet fitted the tribrach at ordinary temperatures, they were quite loose at temperatures in the region of 20 degrees Fahr. below zero.    From Wordnik.com.  [South: the story of Shackleton’s last expedition 1914–1917] Reference

Fanniae of our day to talk of varying the trochee with the iambus, or of resolving either into the tribrach.    From Wordnik.com.  [Famous Reviews] Reference

Juno, meantime, whose feelings were less affected, did not kneel at all; but, like a tribrach, amused herself with chasing a hare which just then crossed one of the forest ridings.    From Wordnik.com.  [The Uncollected Writings of Thomas de Quincey, Vol. 2 With a Preface and Annotations by James Hogg] Reference

A spondee from a tribrach they vapour about prosody, of which they know nothing, and imagine to be new what antedates the Upanishads.    From Wordnik.com.  [Shandygaff] Reference

A trochee, or tribrach, will do very well.    From Wordnik.com.  [Specimens of the Table Talk of Samuel Taylor Coleridge] Reference