| sensor |
a device that detects and responds to certain changes in the environment. Sensors respond to light, temperature, sound, or pressure and then send information to other instruments. |
| sent |
past tense and past participle of "send." |
| sentence |
a complete unit of words in either writing or speech with a clear beginning and a full stop. A sentence usually has a subject and a verb. Sentences can state things, ask questions, give commands, or be exclamations. [3 definitions] |
| sentiment |
a way of thinking or feeling about something. [2 definitions] |
| sentimental |
causing or showing tender feelings. |
| sentry |
a person who guards an entrance or keeps watch against dangers. |
| Seoul |
the capital city of South Korea. |
| sepal |
a part of a plant, shaped like a leaf, that lies at the base of a flower. Sepals hold and protect developing flower buds. |
| separate |
to set apart or keep apart. [9 definitions] |
| separately |
apart; not together; in a separate way. |
| separation |
the act of separating or condition of being separated. [2 definitions] |
| Sept. |
abbreviation of "September." |
| sept-1 |
a prefix that means "seven." |
| September |
the ninth month of the year. September has thirty days. Autumn begins in September for people who live north of the equator. |
| septic |
infected with harmful bacteria. [2 definitions] |
| sequel |
a book or movie that is complete in itself but continues a story begun in an earlier work. |
| sequence |
a pattern or process in which one thing follows another. [2 definitions] |
| sequin |
a very small shiny disk of plastic or metal. Sequins are sewn onto clothing as decoration. |
| sequoia |
a very large evergreen tree that grows in California; redwood or giant sequoia. |
| Serbia |
a European country on the Balkan Peninsula between the countries of Bosnia and Bulgaria. The capital of Serbia is Belgrade. |
| serenade |
a song or tune that is usually performed out of doors in tribute to someone beloved or honored. [2 definitions] |