the world > plants > by growth or development > defined by habit > tree or woody plant > wood or assemblage of trees or shrubs > [noun] > thicket, brake, or brush > of thorn-bushes
1903 R. Kipling 54 The thickets dwined to thorn-scrub, and the water drained to shallows.
1974 R. Adams lviii. 496 This is a country of thorn-scrub and fine, blowing sand.