achoppement (-shop-mān), n.m., stumbling, impediment. Pierre d’—; stumbling-block.
achopper, v.n., to stumble, to knock one’s self against anything; (fig.) to fail.
achromatique (-kro-), adj., achromatic.
achromatisme (-kro-), n.m., (opt.) achromatism.
☉achronique (-kro-), adj. V. acronyque.
aciculaire, adj., acicular, needle-shaped.
acide, n.m., acid.
acide, adj., acid, sour, tart, sharp.
acidifier, v.a., to acidify.
acidité, n.f., acidity, sourness, sharpness, tartness.