bipennis

Borrowed from Latin bipennis (“two-winged”).

bipennis (plural bipennes)

1. (archaic) An axe with an edge or blade on each side of the handle.
   • 1937, Starnes, D. T., “Bilingual Dictionaries of Shakespeare’s Day”, in PMLA‎, volume 52, number 4, page 1009:

     Bipennis... A twibill, axe, or twall, sharpe on both sides, wherewith carpenters make mortaises: it was in old time a weapon

• twibill

From bi- (“two-”) +‎ penna (“wing”) +‎ -is (adjective-forming suffix). As a noun, ellipsis of bipennis secūris f (“two-edged axe”).

• (Classical) IPA^(key): /biˈpen.nis/, [bɪˈpɛnːɪs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /biˈpen.nis/, [biˈpɛnːis]

bipennis (neuter bipenne); third-declension two-termination adjective

1. two-edged
2. two-winged

Third-declension two-termination adjective.

bipennis f (genitive bipennis); third declension

1. A double-edged battle axe.

Third-declension noun (i-stem).

• bipennifer

• “bipennis”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “bipennis”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• bipennis in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• “bipennis”, in Harry Thurston Peck, editor (1898), Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• “bipennis”, in William Smith et al., editor (1890), A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin