1. (chemistry) law stating that every pure substance always contains the same elements combined in the same proportions by weight
   - law of definite proportions

Type of: law, law of nature

• insure
• insured
• insured person
• insurer
• insurgence
• insurgency
• insurgent
• insurmountable
• insurmountably
• insurrection
• insurrectional
• insurrectionary
• insurrectionism
• insurrectionist
• insusceptible
• intact
• intactness
• intaglio
• intaglio printing
• intake
• intake manifold
• intake valve
• intangibility
• intangible
• intangible asset