Estivation is “the act of passing the summer.” According to the Oxford English Dictionary (OED), the word comes from the Latin aestivation-, aestivatio, which means “summer pasturing,” and in botany, the “folded arrangement of petals and sepals in a flower bud.”

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Viet Phuong Tran - 2 boys jump into a river near Nghiem Xuyen village, Vietnam in late afternoon A
Aug 2014