e·co·tone 
(ēkə-tōn′, ĕkə-)
(ēkə-tōn′, ĕkə-)n.
A transitional zone between two communities containing species characteristic of each.
[ECO- + Greek tonos, tension, tone; see TONE.]
- sybaritically
- sybaritism
- sycamine
- sycamore
- syce
- sycee
- syconium
- sycophancy
- sycophant
- sycophantic
- sycophantical
- sycophantically
- sycosis
- Sydenham
- compound
- compoundable
- compound-complex sentence
- compounder
- compound eye
- compound fraction
- compound fracture
- compound gland
- compounding pharmacy
- compound interest
- compound leaf