Mel·a·sto·ma·ceous a. Bot. Belonging to the order of which Melastoma is the type.
    A role for melatonin in sleep facilitation has been inferred from its effect on electroencephalogram patterns, but it has not been possible to demonstrate that wakefulness sleep cycles are driven by periodic accumulation, depletion, or regeneration of melatonin.   --Uwe Ackermann, Essentials of Human Physiology, 1992
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