17. (Her.)
Defn: The lower part of the field. See Escutcheon.
18. The housing of a horse. [Obs.]
19. pl.
Defn: A kind of skirt ( often of velvet or brocade, but sometimes of mailed armor) which hung from the middle to about the knees, or lower. [Obs.]
20. The lower part of a robe or petticoat. [Obs.]
21. An apron. [Obs.] "Bakers in their linen bases." Marston.
22. The point or line from which a start is made; a starting place or a goal in various games. To their appointed base they went. Dryden.
23. (Surv.)
Defn: A line in a survey which, being accurately determined in length and position, serves as the origin from which to compute the distances and positions of any points or objects connected with it by a system of triangles. Lyman.