U1L1T1R1A1S1T1R1U1C3T1U1R1E1S1
17 points
ULTRASTRUCTURES is validvalid
ULTRASTRUCTURE, [n]
ULTRASTRUCTURE, biological structure and esp. fine structure, as of a cell, not visible through an ordinary microscope [n]
ULTRASTRUCTURE, [n]
ULTRASTRUCTURE, biological structure and esp. fine structure, as of a cell, not visible through an ordinary microscope [n]