| SY | the deepest and most prominent of the cortical fissures |
|---|---|
| SY | in some classifications considered a subfamily (Sylviinae) of the family Muscicapidae: Old World (true) warblers |
| SY | alternative classification for the Old World warblers |
| SY | North American rabbits |
| SY | of southeastern United States swamps and lowlands |
| SY | widely distributed in United States except northwest and far west regions |
| SY | of marshy coastal areas from North Carolina to Florida |
| SY | a mineral consisting of native potassium chloride |
| SY | a mineral consisting of native potassium chloride |
| SY | only known species of Cycliophora |
| SY | the relation between two different species of organisms that are interdependent |
| SY | (biology |