| SELAGINELLAS | • selaginellas n. Plural of selaginella. • SELAGINELLA n. a plant of the genus Selaginella, heterosporous club mosses. |
| SELDOMNESSES | • SELDOMNESS n. the state of being seldom. |
| SELECTIONIST | • selectionist adj. Relating to selectionism. • selectionist n. An advocate of selectionism. • SELECTIONIST n. one who considers natural selection a fundamental factor in evolution. |
| SELECTNESSES | • selectnesses n. Plural of selectness. • SELECTNESS n. the state of being select. |
| SELECTORATES | • selectorates n. Plural of selectorate. • SELECTORATE n. as in selectorate theory, a political term. |
| SELENIFEROUS | • seleniferous adj. (Chemistry) containing, or yielding selenium. • SELENIFEROUS adj. containing or yielding selenium. |
| SELENOGRAPHS | • selenographs n. Plural of selenograph. • SELENOGRAPH n. a delineation of the moon. |
| SELENOGRAPHY | • selenography n. (Astronomy, geography, cartography) The scientific study of the Moon’s geographic features; geography of the Moon. • SELENOGRAPHY n. the branch of astronomy dealing with the physical features of the moon. |
| SELENOLOGIES | • selenologies n. Plural of selenology. • SELENOLOGY n. the study of the moon. |
| SELENOLOGIST | • selenologist n. A person skilled or involved in selenology. • SELENOLOGIST n. one who studies the moon. |
| SELFLESSNESS | • selflessness n. The quality or state of being selfless. • SELFLESSNESS n. the state of being selfless. |
| SELFSAMENESS | • selfsameness n. The property of two or more appearances of being of the selfsame underlying object; sameness as regards… • SELFSAMENESS n. the state of being selfsame. |