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actins

[ak-tuhn]

ac·tin

[ak-tuhn]
noun Biochemistry.
a globulin that is present in muscle plasma and that in connection with myosin plays an important role in muscle contraction.

Origin:
1940–45; perhaps act + -in2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Actins is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a gadget; dingus; thingumbob.
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