Mark or dot (7)
I believe the answer is:
speckle
I believe this is a double definition.
'mark' is the first definition.
(thesaurus)
'dot' is the second definition.
(I have seen 'Little dot' mean 'speckle' so perhaps 'dot' could also mean 'speckle')
'or' is the link.
(Other definitions for speckle that I've seen before include "Little dot" , "Small patch of colour" , "pepper with colour" , "Small mark on skin" , "Small spot of colour" .)