1. Plural of celloidin; a transparent, colorless substance made from cellulose nitrate, used in microscopy and histology for embedding tissue samples.
Usage: technical; chiefly used in scientific and medical contexts

Examples

• The laboratory technician prepared celloidins for the tissue embedding procedure.
• Celloidins were commonly used in histological preparation before modern embedding media became standard.
• The pathologist selected celloidins as the embedding medium for the delicate tissue samples.