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| ==Origin== | | ==Origin== |
| [https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] ''glu'', from Anglo-French, from Late Latin ''glut''-, glus; akin to [[Latin]] ''gluten'' glue | | [https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] ''glu'', from Anglo-French, from Late Latin ''glut''-, glus; akin to [[Latin]] ''gluten'' glue |
− | *[http://en.wikipedia.org/wiki/14th_century 14th Century] | + | *[https://en.wikipedia.org/wiki/14th_century 14th Century] |
| ==Definitions== | | ==Definitions== |
| *1a : any of various strong ''adhesive'' substances; especially : a hard protein chiefly gelatinous substance that [[absorbs]] water to form a viscous solution with strong adhesive properties and that is obtained by cooking down collagenous [[materials]] (as hides or bones) | | *1a : any of various strong ''adhesive'' substances; especially : a hard protein chiefly gelatinous substance that [[absorbs]] water to form a viscous solution with strong adhesive properties and that is obtained by cooking down collagenous [[materials]] (as hides or bones) |
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| Adhesives may be found naturally or produced synthetically. The earliest use of adhesive-like substances by [[humans]] was approximately 200,000 years ago. From then until the 1900s, increases in adhesive use and [[discovery]] were relatively [[gradual]]. Only since the last century has the development of synthetic adhesives [[accelerated]] rapidly, and innovation in the field continues to the present. | | Adhesives may be found naturally or produced synthetically. The earliest use of adhesive-like substances by [[humans]] was approximately 200,000 years ago. From then until the 1900s, increases in adhesive use and [[discovery]] were relatively [[gradual]]. Only since the last century has the development of synthetic adhesives [[accelerated]] rapidly, and innovation in the field continues to the present. |
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− | The earliest use of adhesives was discovered in Italy. At this site, two stone flakes partially covered with birch-bark-tar and a third uncovered stone from the [http://en.wikipedia.org/wiki/Middle_Pleistocene_era Middle Pleistocene era] (circa 200,000 years ago) were found. This is thought to be the oldest discovered human use of tar hafted stones.[http://en.wikipedia.org/wiki/Glue] | + | The earliest use of adhesives was discovered in Italy. At this site, two stone flakes partially covered with birch-bark-tar and a third uncovered stone from the [https://en.wikipedia.org/wiki/Middle_Pleistocene_era Middle Pleistocene era] (circa 200,000 years ago) were found. This is thought to be the oldest discovered human use of tar hafted stones.[https://en.wikipedia.org/wiki/Glue] |
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| [[Category: General Reference]] | | [[Category: General Reference]] |