ox knee

== English == === Etymology === From ox +‎ knee, for unknown reasons. === Noun === ox knee (plural ox knees) Cyathula officinalis, a species of Sino-Nepali amaranth-family plant. A chaff flower of species Achyranthes bidentata. ==== Synonyms ==== (Cyathula officinalis): Cyathula root, radix Cyathula === References === ox knee on Wikipedia.Wikipedia Cyathula officinalis on Wikipedia.Wikipedia