A foot preserved in vitro - cheek!

• Certain metrical foot
• For a poet, foot of tree with heart that’s old, cold and hard (the core rotten)
• Foot mythical bird put in the shoe, finally
• Metrical foot

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Trochee \Tro"chee\, n. [L. trochaeus, Gr. ? (sc.?), from ? running, from ? to run. Cf. Troche , Truck a wheel.] (Pros.) A foot of two syllables, the first long and the second short, as in the Latin word ante, or the first accented and the second unaccented, ...

WordNet Word definitions in WordNet
n. a metrical unit with stressed-stressed-unstressed syllables

Wiktionary Word definitions in Wiktionary
n. A metrical foot in verse consisting of a stressed syllable followed by an unstressed syllable.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
metrical foot consisting of a long followed by a short syllable, or an accented followed by an unaccented one, 1580s, from French trochée , from Latin trochaeus "a trochee," from Greek trokhaios (pous) , literally "a running (foot)," from trekhein "to run" ...

Wikipedia Word definitions in Wikipedia
In poetic meter , a trochee , choree , or choreus , is a metrical foot consisting of a stressed syllable followed by an unstressed one, in English, or a heavy syllable followed by a light one in Latin or Greek. In this respect, a trochee is the reverse ...