A a


    • US Pronunciation
    • US IPA
    • [ak-tuh n]
    • /ˈæk tən/
    • US Pronunciation
    • US IPA
    • [ak-tuh n]
    • /ˈæk tən/

Definitions of actin word

  • noun actin a protein that participates in many kinds of cell movement, including muscle contraction, during which it interacts with filaments of a second protein, myosin 3
  • noun actin a protein in muscles 3
  • noun actin a globulin that is present in muscle plasma and that in connection with myosin plays an important role in muscle contraction. 1
  • noun actin A protein that forms (together with myosin) the contractile filaments of muscle cells, and is also involved in motion in other types of cells. 1
  • noun actin (Uncountable Noun) (biochemistry) A globular structural protein that polymerizes in a helical fashion to form an actin filament (or microfilament). 0
  • noun actin (Countable Noun) (biochemistry) One of the six isoforms of actin. 0

Information block about the term

Origin of actin

First appearance:

before 1940
One of the 7% newest English words
1940-45; perhaps act + -in2

Historical Comparancy

Parts of speech for Actin


actin popularity

A common word. It’s meaning is known to most children of preschool age. About 91% of English native speakers know the meaning and use the word.
Most Europeans know this English word. The frequency of it’s usage is somewhere between "mom" and "screwdriver".

actin usage trend in Literature

This diagram is provided by Google Ngram Viewer

Top questions with actin

  • what is actin?
  • what causes the myosin head to disconnect from actin?
  • what is actin and myosin?
  • what are actin and myosin?
  • what does actin do?
  • what are actin?
  • how does myosin bind to actin?
  • what is the function of actin and myosin filaments?
  • actin and myosin are what type of molecule?
  • what does actin and myosin do?
  • how do actin and myosin molecules interact?
  • where is the protein called actin located in the body?
  • what are actin filaments?
  • what is the difference between actin and myosin?
  • where is actin found?

See also

Matching words

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