1. A transparent, colorless, flammable substance made from cellulose nitrate, used especially in microscopy and histology for embedding tissue samples.
Usage: technical; also called collodion in some contexts; primarily used in scientific and medical laboratories

Examples

• The pathologist used celloidin to embed the tissue sample for microscopic examination.
• Celloidin embedding was a standard technique in histology before modern paraffin wax methods became widespread.
• The celloidin solution was carefully applied to preserve the delicate tissue structure.
• Under the microscope, the celloidin-embedded specimen showed excellent detail and clarity.