subset

[suhb-set] /ˈsʌbˌsɛt/
noun
1.
a set that is a part of a larger set.
2.
Mathematics. a set consisting of elements of a given set that can be the same as the given set or smaller.
Origin
1900-05; sub- + set
Examples from the web for subsets
  • Vehicle and boat registration fees are subsets of this kind of tax.
  • So far, this has only been done for restricted subsets of python.
British Dictionary definitions for subsets

subset

/ˈsʌbˌsɛt/
noun
1.
(maths)
  1. a set the members of which are all members of some given class: A is a subset of B is usually written A⊆B
  2. proper subset, one that is strictly contained within a larger class and excludes some of its members A⊂B
2.
a set within a larger set
Word Origin and History for subsets

subset

n.

"subordinate set," 1902, from sub- + set (n.1).

subsets in Science
subset
  (sŭb'sět')   
A set whose members are all contained in another set. The set of positive integers, for example, is a subset of the set of integers.