a baker's dozen

Webster's Dictionary (GCIDE)

Baker \Bak"er\, n. [AS. b[ae]cere. See Bake, v. t.]

1.One whose business it is to bake bread, biscuit, etc. [1913 Webster]

2.A portable oven in which baking is done. [U.S.] [1913 Webster]

Baker foot, a distorted foot. [Obs.] --Jer. Taylor.

Baker's itch, a rash on the back of the hand, caused by the irritating properties of yeast.

Baker's salt, the subcarbonate of ammonia, sometimes used instead of soda, in making bread. [1913 Webster]

Dozen \Doz"en\ (d[u^]z"'n), n.; pl. Dozen (before another noun), Dozens (d[u^]z"'nz). [OE. doseine, dosein, OF. doseine, F. douzaine, fr. douze twelve, fr. L. duodecim; duo two + decem ten. See Two, Ten, and cf. Duodecimal.]

1.A collection of twelve objects; a tale or set of twelve; with or without of before the substantive which follows. "Some six or seven dozen of Scots." "A dozen of shirts to your back." "A dozen sons." "Half a dozen friends." --Shak. [1913 Webster]

2.An indefinite small number. --Milton. [1913 Webster]

A baker's dozen, thirteen; -- called also a long dozen. [1913 Webster]