| SY | (of ovaries of flowering plants) consisting of united carpels |
|---|---|
| SY | (logic) a term that cannot be used meaningfully in isolation |
| SY | (logic) of a term that cannot stand as the subject or (especially) the predicate of a proposition but must be used in conjunction with other terms |
| SY | cyclotron that achieves relativistic velocities by modulating the frequency of the accelerating electric field |
| SY | a device used in photography to synchronize the peak of a flash with the opening of the camera shutter |
| SY | an automotive system for shifting gears in which the gears revolve at the same speed and so shift smoothly |
| SY | occurring or existing at the same time or having the same period or phase |
| SY | the relation that exists when things occur at the same time |
| SY | concerned with phenomena (especially language) at a particular period without considering historical antecedents |
| SY | occurring or existing at the same time or having the same period or phase |
| SY | (of taxa) occurring in the same period of geological time |
| SY | an explanation of a person's mastery of their native language |