a. [ L. quercus an oak + E. tannic. ] (Chem.) Pertaining to, or designating, a tannic acid found in oak bark and extracted as a yellowish brown amorphous substance. [ 1913 Webster ]

n. (Chem.) A white crystalline substance, C6H7(OH)5, found in acorns, the fruit of the oak (Quercus). It has a sweet taste, and is regarded as a pentacid alcohol. [ 1913 Webster ]

n. (Chem.) A yellow crystalline substance, occurring quite widely distributed in the vegetable kingdom, as in apple-tree bark, horse-chestnut leaves, etc., but originally obtained by the decomposition of quercitrin. Called also meletin. [ 1913 Webster ]

n. [ Cf. F. quercitrin. See Quercitron. ] (Chem.) A glucoside extracted from the bark of the oak (Quercus) as a bitter citron-yellow crystalline substance, used as a pigment and called quercitron. [ 1913 Webster ]

n. [ F. quercitron, the name of the name of tree; L. quercus an oak + citrus the citron tree. ] 1. The yellow inner bark of the Quercus tinctoria, the American black oak, yellow oak, dyer's oak, or quercitron oak, a large forest tree growing from Maine to eastern Texas. [ 1913 Webster ]

2. Quercitrin, used as a pigment. See Quercitrin. [ 1913 Webster ]

‖n. [ L., an oak. ] (Bot.) A genus of trees constituted by the oak. See Oak. [ 1913 Webster ]

n. [ See 2d Quarrel. ] (O. Eng. Law) A complaint to a court. See Audita Querela. [ Obs. ] Ayliffe. [ 1913 Webster ]

n. [ L. querens, p. pr. of queri to complain. ] (O. Eng. Law) A complainant; a plaintiff. [ 1913 Webster ]

n. [ L. quaerens, p. pr. of quaerere to search for, to inquire. ] An inquirer. [ Obs. ] Aubrey. [ 1913 Webster ]

a. [ L. querimonia a complaint, fr. queri to complain. See Querulous. ] Complaining; querulous; apt to complain. -- Quer`i*mo"ni*ous*ly, adv. -- Quer`i*mo"ni*ous*ness, n. [ 1913 Webster ]