Antennule Definition
 ăn-tĕnyo͝ol 
    noun
  
 A small antenna, esp. a crustacean's secondary, smaller antenna.
 Webster's New World 
A small antenna or similar organ, especially one of the first pair of small antennae on the head of a crustacean.
 American Heritage Medicine 
(zoology) A small antenna.
Wiktionary 
Other Word Forms of Antennule
Noun
Singular:
 antennulePlural:
 antennulesOrigin of Antennule
-  French diminutive of antenne antenna from Medieval Latin antenna sail yard antenna From American Heritage Dictionary of the English Language, 5th Edition 
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