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Definition of Aftershaft
1. Noun. A supplementary feather (usually small) on the underside of the base of the shaft of some feathers in some birds.
Definition of Aftershaft
1. n. The hypoptilum.
Definition of Aftershaft
1. Noun. (ornithology) An accessory plume arising from the posterior of the contour feathers of many birds. ¹
¹ Source: wiktionary.com
Medical Definition of Aftershaft
1.