A mordant is a substance used to set dyes on fabrics or tissue. It is forming coordination with the colour which then attached to the cloth. It used for dyeing of fabrics or intensifying stains in a cell or tissue preparations.
Morphology is a term used to describe the study of the physical form and structure (see below) of a material and include a broad spectre of characteristics. Fibre morphology contains macro-structure, micro-structure, the sub-microscopic and fine structure of fibres, which are only observable through a light microscope.