A synalepha or synaloepha Greek language συναλοιφή (or ), from : συν- "together" and "I anoint", "smear". is the merging of two syllables into one, especially when it causes two words to be pronounced as one.
The original meaning in Ancient Greek is more general than modern usage and includes coalescence of vowels within a word. Similarly, synalepha most often refers to elision (as in English contraction), but it can also refer to coalescence by other : synizesis, synaeresis or crasis.W. Sidney Allen, Vox Graeca, chart of "Types of vowel-junction", p. 98.
The words que and al form one syllable in counting them because of synalepha. The same thing happens with -ro and os- and so the line has eleven syllables (syllable boundaries are shown by a dot):
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