Answer:

iambus

Answer	Crossword Clue
IAMBUS	Poetic foot
IAMBUS	Two-syllable foot.
IAMBUS	Poetic foot.

IAMBUS	Metrical foot
IAMBUS	Trochee's opposite
IAMBUS	Foot in a line
IAMBUS	Two-syllable unit
IAMBUS	Metrical foot (Var.)

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.