- tactoid
- tac·toid 'tak-.tȯid n an elongated particle (as in a sickle cell, myosin, or fibrin) that appears as a spindle-shaped body under a polarizing microscope
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tac·toid (takґtoid) an elongated crystallike aggregation that appears spindle-shaped under a polarizing microscope, such as a sickle cell, myosin, or fibrin. See also immunotactoid.
Medical dictionary. 2011.