pin·nate 
(pĭnāt′)
(pĭnāt′)adj.
Resembling a feather in having parts or branches arranged on each side of a common axis: pinnate leaves; pinnate gills.
[Latin pinnātus, feathered, from pinna, feather; see pet- in the Appendix of Indo-European roots.]
pinnate′ly adv.
pinnatetop: pinnate leaf
bottom: bipinnate leaf