kind of seaweed, c. 1600, Latin, from Greek zōstēr "girdle," originally "warrior's belt," from zōnnynai (see zone (n.)). Meaning "shingles" is from 1706; in the literal sense, "a belt or girdle, especially for men," from 1824.
"small, often inflamed, swelling of the skin," late 14c. (early 14c. as a surname), of unknown origin; perhaps related to Old English pipligende "having shingles;" also compare Latin papula, papilla (see pap (n.2)). As a verb, "to cover with pimples," from c. 1600. Related: Pimples.