Category Nuances for biological_material:

• delicate,
• marine,
• fine,
• natural,
• dispersed,
• wet,
• rubberlike,
• nontraditional,
• diverse,
• organic,
• noncrystalline,
• proprietary,
• tangible,
• soft,
• difficult,
• heterogeneous,
• fatty,
• inner,
• sensitive,
• physical,
• disordered,
• harmful,
• complex,
• charged,
• translucent,

Simple Categories for biological_material:

• waste,
• surface,
• substance,
• material,
• particle,
• structure,
• solid,
• content,
• system,
• contaminant,