Definition of cropmark in English:

cropmark

Pronunciation /ˈkräpˌmärk/ /ˈkrɑpˌmɑrk/

noun

Archaeology
  • A visible trace of a buried construction revealed by the uneven growth or survival of plants above the remains of structures or ditches, due chiefly to variation in water retention by the soil.

    • ‘the extremely dry weather has led to many previously unknown archaeological sites appearing as cropmarks in fields across Europe’