Dictionary
2 ENTRIES FOUND:

1rosin

noun ros·in \ˈrä-zən, ˈr-, dial ˈr-zəm\

: a hard and slightly sticky substance that has various uses (such as to make the bows of violins and similar instruments move more easily across the strings)

Full Definition of ROSIN

:  a translucent amber-colored to almost black brittle friable resin that is obtained from the oleoresin or deadwood of pine trees or from tall oil and used especially in making varnish

Origin of ROSIN

Middle English, from Anglo-French reisine, rosine resin
First Known Use: 13th century

2rosin

verb
ros·inedros·in·ing \ˈräz-niŋ, ˈrz-; ˈrä-zən-iŋ, ˈr-\

Definition of ROSIN

transitive verb
:  to rub or treat (as the bow of a violin) with rosin

First Known Use of ROSIN

15th century

rosin

noun ros·in \ˈräz-ən, ˈrz-\   (Medical Dictionary)

Medical Definition of ROSIN

:  a translucent amber-colored to almost black brittle friable resin that is obtained from the oleoresin or dead wood of pine trees or from tall oil and is used in pharmacology as an adhesive constituent in plasters, cerates, and ointments—called also colophony

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