1. Plural of gelly; a type of explosive device or detonator used in mining or demolition.
Usage: technical; often used in mining and construction contexts
2. Plural of gelly; informal term for gelatin or gel-based substances, particularly in theatrical or special effects contexts.
Usage: informal; chiefly used in film and theater production

Examples

• The demolition crew carefully placed the gellies around the building's support columns.
• The special effects team used colored gellies to create dramatic lighting effects on stage.
• Mining operations require trained personnel to handle gellies safely.
• The theater's lighting designer ordered several boxes of gellies for the upcoming production.