[δευτερόπρωτος] from G1208 and G4413; 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)
Usages throughout the bible
Luke 6:1
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And it came to pass on the second G1207 sabbath after the first, G1207 that he went through the corn fields; and his disciples plucked the ears of corn, and did eat, rubbing them in their hands.