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Webster 1913 Edition

‖

Noun.

;

pl. L.

Hypoptila

(#)

, E.

Hypoptilums

(#)

[NL., fr. Gr.

ὑπό

beneath + [GREEK] down.]

(Zool.)

An accessory plume arising from the posterior side of the stem of the contour feathers of many birds; – called also

aftershaft

. See Illust. of

hypoptilum ‎(plural hypoptila)

aftershaft — see aftershaft