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ACT-UP
act up
Actaeon
ACTH
actin
actin-
actinal
acting
actinian
actinic
actinide
actinism
actinium
actino-
actinolite
actinometer
actinomorphic
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actinian
ac·tin·i·an [ ak tínnee ən ]


noun 
Definition:
 
marine biology  ( technical )
Same as  sea anemone
[Late 19th century. < modern Latin Actinia< Greek aktin- "ray"]
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