Lab

n. 1. A telltale; a prater; a blabber. [ Obs. ] “I am no lab.” Chaucer. [ 1913 Webster ]

2. [ By truncation of laboratory. ] Laboratory. [ Colloq. ] [ PJC ]

a. Of or pertaining to a laboratory; as, a lab bench. [ Colloq. ] [ PJC ]

n. (Eccl. Hist.) A follower of Jean de Labadie, a religious teacher of the 17th century, who left the Roman Catholic Church and taught a kind of mysticism, and the obligation of community of property among Christians. [ 1913 Webster ]

pos>n. [ From Labarraque, a Parisian apothecary. ] (Med.) An aqueous solution of sodium hypochlorite, extensively used as a disinfectant. [ 1913 Webster ]

Sodium hypochlorite is the same compound used in the commercial trademarked bleach Clorox(TM). It has both disinfectant and bleaching activity. [ PJC ]

‖n.; pl. Labara [ L. ] The standard adopted by the Emperor Constantine after his conversion to Christianity. It is described as a pike bearing a silk banner hanging from a crosspiece, and surmounted by a golden crown. It bore a monogram of the first two letters (ΧΡ) (which appear like the English letters X and P), of the name of Christ in its Greek form. Later, the name was given to various modifications of this standard. [ 1913 Webster ]

n. (Bot.) See Ladanum. [ 1913 Webster ]

n. [ See Labefy. ] The act of labefying or making weak; the state of being weakened; decay; ruin. [ 1913 Webster ]

There is in it such a labefaction of all principles as may be injurious to morality. Johnson. [ 1913 Webster ]

v. t. [ L. labefacere; labare to totter + facere to make. ] To weaken or impair. [ R. ] [ 1913 Webster ]