n. A classical metrical foot having three short or unstressed syllables
n. A circular platform on three legs each having levelling screws; used to connect a theodolite to a tripod
the GNU version of the Collaborative International Dictionary of English
n. A poetic foot of three short syllables, .
The Century Dictionary and Cyclopedia
n. In ancient prosody, a foot consisting of three short times or syllables, two of which belong to the thesis and one to the arsis, or vice versa.
n. Same as tribrachial.
Word Usage
"Classical prosody distinguished several other feet, some of which are occasionally mentioned in treatises on English verse: amphibrach ◡ _ ◡, tribrach ◡ ◡ ◡, pyrrhic ◡ ◡, paeon _ ◡ ◡ ◡, choriamb _ ◡ ◡ _."