Stanza

In poetry, a stanza is a group of lines within a poem, usually set off from others by a blank line or indentation. Stanzas can have regular rhyme and metrical schemes, but they are not required to have either. There are many different forms of stanzas. Some stanzaic forms are simple, such as four-line quatrains. Other forms are more complex, such as the Spenserian stanza. Fixed verse poems, such a... (Wikipedia)