Word meaning "feather-like"

Solution 1:

How about "plumose"?

It has the same meaning as "feathery."

Solution 2:

Pennaceous is one word common in ornithology for feather-like. You could also use these words derived from plume. (See Free Dictionary.)

• plumose
• plumate
• plumous

One point to note is the latter set of words could be used both for feather-like and feathery, so the usage is inferred from the context. Going by the OED, only plumose stands for feather-like; the rest are for having feathers or feathery.

Solution 3:

Similar to pinnated is pennate, used to refer to the feather-like strands of the bicep, for instance.