Etymology
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penne (n.)

pasta in the form of tubes cut diagonally, by 1981, from Italian penne (1875), an extended use of the plural of penna, literally "quill," from Latin penna (see pen (n.1)). So called because the oblique cut resembles the writing tip of a quill pen. 

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Definitions of penne

penne (n.)
pasta in short tubes with diagonally cut ends;
From wordnet.princeton.edu