| subspecies |
a subdivision of a plant or animal species that shows differences from others of the same species, as a result of difference in geographical location or time period. |
| substance |
that of which something is made; matter. [6 definitions] |
| substance abuse |
habitual or harmful use of drugs, alcohol, or other substances that cause heightened mood or loss of inhibition, and which are usually addictive. |
| substanceless |
combined form of substance. |
| substandard |
below or short of the expected or required standard. [2 definitions] |
| substantial |
having physical substance; solid; concrete. [8 definitions] |
| substantially |
with great or strong substance; solidly; strongly. [2 definitions] |
| substantiate |
to establish or support by providing proof or evidence. [3 definitions] |
| substantive |
having an independent existence or character. [4 definitions] |
| substate |
combined form of state. |
| 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. |