Baton - Conductor's stick.
Canonic - A term used to describe a polyphonic style of music in which all the parts have the same melody but which start at different times.
Delicato - Delicately.
First ending - One or more measures which occur at the end of the stanza or stanzas. It is usually indicated:
Grand staff, Great staff - The G and F clef staves together make the grand (great) staff.