prepennan.

Brit.

/priːˈpɛnə/, U.S.

/priˈpɛnə/

Inflections: Plural prepennae.

Forms: 1900s– praepenna (rare), 1900s– prepenna.

Origin: A borrowing from Latin, combined with an English element. Etymons: pre- prefix, Latin penna.

Etymology: < pre- prefix + classical Latin penna feather (see pen n.³).

Ornithology.

A down feather of a young bird; spec. one that is replaced by a contour feather in the adult bird.

ΚΠ

1900 Trans. Zool. Soc. 15 v. 162 The nessoptiles of the Palæognathæ consist of prepennæ only.

1976 Wilhelm Roux's Arch. Developmental Biol. 179 85 Some praepennae of the latter embryo showed a red-brown pigment.

1987 Jrnl. Field Ornithol. 58 334 Prepennae down could provide insulation for development of homeothermy.

This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022).

单词	prepenna
释义	prepennan. Brit. /priːˈpɛnə/, U.S. /priˈpɛnə/ Inflections: Plural prepennae. Forms: 1900s– praepenna (rare), 1900s– prepenna. Origin: A borrowing from Latin, combined with an English element. Etymons: pre- prefix, Latin penna. Etymology: < pre- prefix + classical Latin penna feather (see pen n.³). Ornithology. A down feather of a young bird; spec. one that is replaced by a contour feather in the adult bird. ΚΠ 1900 Trans. Zool. Soc. 15 v. 162 The nessoptiles of the Palæognathæ consist of prepennæ only. 1976 Wilhelm Roux's Arch. Developmental Biol. 179 85 Some praepennae of the latter embryo showed a red-brown pigment. 1987 Jrnl. Field Ornithol. 58 334 Prepennae down could provide insulation for development of homeothermy. This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022). < n.1900
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