A verse line with a dactyl followed by a spondee or trochee.
The following stanza is composed of four lines.
The first three lines, 11 syllables long, are called hendecasyllabics; the last line, only five syllables, designed to represent, an 'adonic.'

Marvellous Sapphics by Rachel Wetzsteon.

I would like to tell you about a lovely
stanza form I've long been an ardent fan of:
it was conjured up in a simpler time by
Classical Sappho.