Lewis Short
flexūra (noun F) : flexus, from flecto
* A bending, winding, turning (rare; not in Cic.).
* Lit.: lateris,Lucr. 4, 336: angustiae flexuraeque vicorum,Suet. Ner. 38.
* Trop.: virtus recta est: flexuram non recipit,Sen. Ep. 71, 19.
* Transf., in gram., inflection, declension of a word, Varr. L. L. 10, § 28 Müll.
Charlton T. Lewis, Charles Short, A Latin Dictionary