syn·cli·nal 
(sĭn-klīnəl)
(sĭn-klīnəl)adj.
1. Sloping downward from opposite directions to meet in a common point or line.
2. Geology Relating to, formed by, or forming a syncline.
- radiographic
- radiographically
- radiography
- radioimmunoassay
- radioimmunological
- radioimmunology
- radioiodine
- radioisotope
- radiolabel
- radiolarian
- radiolocation
- radiologic
- allocation
- allocator
- allochthon
- allochthonous
- allocution
- all of
- all of a sudden
- allogamy
- allogeneic
- allogeneically
- allogenic
- allograft
- allograph