Found:

Mora

PHONOLOGY: a unit of syllable weight in moraic theory. Moras are the units to which metrical structure may refer. EXAMPLE: long vowels are often considered to be bimoraic, while short ones are monomoraic. This would explain the difference in behaviour with respect to stress-rules between these two classes of vowels in quantity-sensitive languages (see Quantity-(in)sensitivity).

LIT.	Hyman, L. (1985) McCarthy, J. and A. Prince (1986) Prince, A. (1983) Van der Hulst (1984)