Hard, amorphous, brittle, inorganic, usually transparent, polymerous silicate of basic oxides, usually potassium or sodium. It is used in the form of hard sheets, vessels, tubing, fibers, ceramics, beads, etc.
D006801
Humans
Members of the species Homo sapiens.
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000041
Absenteeism
Chronic absence from work or other duty.
D000062
Accidents, Occupational
Unforeseen occurrences, especially injuries in the course of work-related activities.