Grain - Vine's Expository Dictionary of New Testament Words
Grain
[ 1,,G2848, kokkos ]denotes a grain," Matthew 13:31; Matthew 17:20; Mark 4:31; Luke 13:19; Luke 17:6; John 12:24 (AV, "corn"); 1 Corinthians 15:37 (where the RV has "a ... grain," to distinguish it from "grain" in general). See CORN.