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Use "valvae" in a sentence
"Ipse, literally _self_, acquires its special force from the context; as, -- eō ipsō diē, _on that very day_; ad ipsam rīpam, _close to the bank_; ipsō terrōre, _by mere fright_; valvae sē ipsae aperuērunt, _the doors opened of their own accord_; ipse aderat, _he was present in person_."
"He was not much acquainted with valves of any sort, but he knew that valvae were folding-doors, and through this crevice came a sudden light startling him with his first vivid notion of finely adjusted mechanism in the human frame."
"Stijgma I. Capfula longa corniculata concorta i-locularis 4 - valvis; valvae feminibus emiffis contorta»."