1. Geology(Abstract Noun) The fluvial cycle of erosion published in 1909 defined a young, mature, and old sequence in the development of river valleys and the landscape the rivers were eroding. ভূপৃষ্ঠ, বিকাশত জৰিত এক চক্ৰীয় প্ৰক্ৰিয়া৷

English: cycle of errosion, Davis` Stages,
Assamese: অৱক্ষয় চক্ৰ, ক্ষয় চক্ৰ