Sept"foil (?), n. [F. sept seven (L. septem) + E. foil leaf: cf. L. septifolium.]
A European herb, the tormentil. See Tormentil.
An ornamental foliation having seven lobes. Cf. Cinquefoil, Quarterfoil, and Trefoil.
A typical figure, consisting of seven equal segments of a circle, used to denote the gifts of the Holy Chost, the seven sacraments as recognized by the Roman Catholic Church, etc.
© Webster 1913.