deuteroprotos (Greek #1207)
second-first, i.e. (specially) a designation of the Sabbath immediately after the Paschal week (being the second after Passover day, and the first of the seven Sabbaths intervening before Pentecost)
KJV usage: second ... after the first.
Pronounce: dyoo-ter-op'-ro-tos
Origin: from 1208 and 4413