A seal or closure device placed at the end of a tube, pipe, or cylindrical container to prevent leakage or contamination.
Compound word from 'end' (Old English 'endian') and 'seal' (from Old French 'seel', from Latin 'sigillum'), combining in industrial contexts to describe endpoint sealing mechanisms.
Endseal represents how English creates technical vocabulary by stacking simple words together—manufacturing needed new terms fast, so workers just combined existing words into logical compounds.
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