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dichasium Definition

di·cha·sium (dī kāzē əm, -z̸hē-)

noun pl. dichasia -·sia ()

Bot. a cyme in which two opposite branches arise below each terminal flower
also dichasial cyme di·cha′sial cyme

Etymology: ModL < Gr dichasis, a division < dichazein, to divide into two < dicha: see dicho-