A chemical compound containing two urea groups bonded together.
From Latin 'bi-' (two) + 'urea' (a compound found in urine). Urea derives from 'ur-' (urine) in Medieval Latin. The term developed in organic chemistry to describe molecules with duplicated urea units.
Biureas are fascinating because they're used to create special polymers and resins that are super strong and heat-resistant—you might find them in aircraft parts or high-performance sporting equipment!
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