| substation |
a subsidiary station or office, as of the post office or of a power distribution network. |
| substitute |
a person or thing that takes the place of another. [5 definitions] |
| substrate |
see "substratum." [2 definitions] |
| substratum |
that which forms a bed or layer below something else. [2 definitions] |
| substructure |
the supporting structure of a building or other construction; foundation. |
| subsume |
to classify, consider, or include (an idea, proposition, or the like) in a more comprehensive or general category or principle. [2 definitions] |
| subsurface |
a surface lying below the main surface. |
| subsystem |
a system that is part of a larger system. |
| subtask |
combined form of task. |
| subtaxon |
combined form of taxon. |
| subteen |
a child who is nearly thirteen. |
| subtemperate |
of, designating, or occurring in the colder regions of the temperate zones. |
| subtenant |
a person who rents property from a tenant. |
| subtend |
in geometry, to extend across or under, or be opposite. |
| subter- |
below; secret. |
| subterfuge |
a stratagem or artifice used to hide, avoid, or deceive. |
| subterranean |
below the earth's surface; underground. [3 definitions] |
| subtheme |
combined form of theme. |
| subtherapeutic |
combined form of therapeutic. |
| subtilize |
to make (an argument or the like) more subtle. [3 definitions] |
| subtitle |
a subordinate title or heading below the main title of a written text. [4 definitions] |