<p><strong>Noun</strong></p><ul><li>a cloud of a class characterized by thin white filaments or narrow bands and a composition of ice crystals: of high altitude, about 20,000–40,000 feet (6000–12,000 meters).</li><li>a cirriform cloud.</li><li>a tendril.</li><li>a filament or slender appendage serving as a foot, tentacle, barbel, etc.</li><li>the male copulatory organ of flatworms and various other invertebrates.</li></ul>