Defined as the arrangement of a line poetry by number syllables and rhythm accented syllables?

The arrangement of a line of poetry by the number of syllables and the rhythm of accented syllables is called meter.

Here's a breakdown:

* Syllabic Meter: Refers to the number of syllables in a line. Common examples include iambic pentameter (10 syllables), iambic tetrameter (8 syllables), and iambic trimeter (6 syllables).

* Rhythm: Refers to the pattern of stressed and unstressed syllables within a line. The most common rhythmic pattern is iambic, which is an unstressed syllable followed by a stressed syllable (e.g., "before").

Meter is a key component of traditional poetry forms. It can create a distinct rhythm and musicality, contributing to the overall effect of the poem.