n. an amino acid that is an intermediate in the conversion of ornithine to arginine. [ WordNet 1.5 ]
n. a genus of vines including the watermelons (Citrullus lanata).
n. A bar so placed as to resist weight. [ 1913 Webster ]
n. [ G. trolle, trulle; cf. OD. drol a jester, Dan. trold an elf, imp, Sw. troll a goblin, Icel. troll, tröll, a giant, fiend, demon. Cf. Droll, Troll. ]
n. [ L. trullissatio, from trullissare to trowel, to plaster, fr. trulla a trowel. ] The act of laying on coats of plaster with a trowel. [ 1913 Webster ]