| SY | a strike in support of other workers who are on strike |
|---|---|
| SY | (of biological species or speciation) occurring in the same or overlapping geographical areas |
| SY | having a corolla composed of partially or wholly fused petals forming a corolla shaped like a tube or funnel |
| SY | used in some classifications for the siamangs |
| SY | large black gibbon of Sumatra having the 2nd and 3rd toes partially united by a web |
| SY | minute arthropod often infesting the underground parts of truck-garden and greenhouse crops |
| SY | harmonious in sound |
| SY | relating to or characteristic or suggestive of a symphony |
| SY | a long and complex sonata for symphony orchestra |
| SY | an orchestral composition based on literature or folk tales |
| SY | harmonious in sound |
| SY | play or sound together, in harmony |