| 释义 |
subbase
—subbasal, adj.
/sub"bays'/, n.
1. Archit. the lowest part of a base, as of a column, that consists of two or more horizontal members.
2. Math. a collection of subsets of a topological space having the property that every open set of a given topology can be written as the union of intersections of finite numbers of sets in the collection. Cf. base1 (def. 13b).
[1820-30; SUB- + BASE1] |