| Answer | Crossword Clue |
|---|---|
| integument | an external covering or coating |
| integuments | INTEGUMENT, an external covering or coating |
| airframe | the framework and external covering of an airplane, rocket, etc. |
| feathered | any of the light horny epidermal outgrowths that form the external covering of the body of birds and that consist of a shaft bearing on each side a series of barbs which bear barbules which in turn bear barbicels commonly ending in hooked hamuli and interlocking with the barbules of an adjacent barb to link the barbs into a continuous vane |
| testa | the hard external coating or integument of a seed |
| testae | the hard external coating or integument of a seed |
