my·o·fil·a·ment 
(mī′ə-fĭlə-mənt)
(mī′ə-fĭlə-mənt)n.
Any of the ultramicroscopic filaments, made up of actin and myosin, that are the structural units of a myofibril.
- second person
- second-person
- second quantum number
- second-rate
- second-rateness
- second-rater
- second sight
- second-story man
- second-strike
- second string
- second-string
- second-stringer
- second thought
- second wind
- Second World
- Second-World
- Second World War
- secrecy
- secret
- secreta
- secretagogue
- secretarial
- secretariat
- secretary
- secretary bird