Changes

==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)

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.

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]

[[Category: General Reference]]

[[Category: General Reference]]