Dual of kele' in the original sense of separation; two heterogeneities -- divers seeds (-e kinds), mingled (seed).
see HEBREW kele'
H3610. kilayim
כִּלְאַיִם noun [masculine] dual two kinds (Arabic , both; Ethiopic two; perhaps also כלאי MI23 both, two, NöLCB 1889, 61, cf DrSm xcii; Sm u. SoMI, 1886 suggest reservoirs; see also כְּלִי) — כ ׳תַּרְבִּיעַ לֹא בְּהֶמְתְּךָ Leviticus 19:19 not cause thy cattle to breed (in) two kinds; כ תִּזְרַע לֹא ׳שָֽׂדְךָ 19:19 (H); כ ׳כַּרְמְךָ תִּזְרַע לֹא Deuteronomy 22:9 (both כִּלְאָ֑יִם); כ ׳בֶּגֶד Leviticus 19:19 (H); — only in law of H and D against mixtures.