point of reference

: an individual detail : item

: a distinguishing detail

: the most important essential in a discussion or matter

: to furnish with a point : sharpen

: to give added force, emphasis, or piquancy to

: to scratch out the old mortar from the joints of (something, such as a brick wall) and fill in with new material

: the act of referring or consulting

: a bearing on a matter : relation

: something that refers: such as

: used or usable for reference

: to supply with references

: to cite in or as a reference

: to put in a form (such as a table) adapted to easy reference