The twentieth letter of Classical and Modern Greek; the twenty-second letter of Old and Ancient Greek.
An upsilon meson, or bottomonium.
The name of the Latin-script letter Y.
A Y-shaped object: a wye level, wye-connected. Especially a Y-shaped connection of three sections of road or railroad track.
To reverse the direction of a train using a wye.
To make something into a wye (letter Y) shape.