Letters that make birch oil
o, b, l, c, h, r, i are letters that make 'birch oil'
o, b, l, c, h, r, i are letters that make 'birch oil'
1 possible definitions for 'birch oil'
Under this definition, birch oil is a noun and has the following properties:
methyl salicylate, sweet-birch oil have the same meaning as 'birch oil'
'birch oil' can be a type of salicylate.
'birch oil' can be a substance of wintergreen oil, oil of wintergreen.