series Look up series at Dictionary.com
1611, "a number or set of things of one kind arranged in a line," from L. series "row, chain, series," from serere "to join, link, bind together, put," from PIE base *ser- "to line up, join" (cf. Skt. sarat- "thread," Gk. eirein "to fasten together in rows," Goth. sarwa (pl.) "armor, arms," O.N. sörve "necklace of stringed pearls," O.Ir. sernaid "he joins together," Welsh ystret "row"). Meaning "set of printed works published consecutively" is from 1711. Meaning "set of radio or television programs with the same characters and themes" is attested from 1949.