You searched for: “imparipinnate
imparipinnate (adjective)
Having an uneven number of pinnae (two rows of branches, or leaflets arranged on each side of a common stem), by virtue of having one terminal pinna (a primary segment of the blade of a compound leaf): "The trunk the tree is without branches and has a crown of feathery or imparipinnate fronds or leaves like a fern."
This entry is located in the following units: pari-, par- (page 2) pinni-, pin- (page 1)