Main Entry:

¹ros·in

Pronunciation:

\ˈrä-z^ən, ˈrȯ-, dialect ˈrȯ-zəm\

Function:

noun

Etymology:

Middle English, from Anglo-French reisine, rosine resin

Date:

13th century

: 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