Grad"u*a"tion (?), n. [LL. graduatio promotion to a degree: cf. F. graduation division into degrees.]
1.
The act of graduating, or the state of being graduated; as, graduation of a scale; graduation at a college; graduation in color; graduation by evaporation; the graduation of a bird's tail, etc.
2.
The marks on an instrument or vessel to indicate degrees or quantity; a scale.
3.
The exposure of a liquid in large surfaces to the air, so as to hasten its evaporation.
© Webster 1913.