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4 total sentences available.
Such seifs have a somewhat zig-zag form instead of a fairly straight line. On the top of seifs small transverse dunelets are very often found, and these may be likened to almost straightened-out barchans.[…]On the top of the seif they form a wave-like pattern with a fairly defined "wavelength".
Source: wiktionary
Though the actual transition forms suggested in Fig. 76 do exist and have been examined by the author, the above tentative explanation of the growth of a seif dune chain should certainly not be taken as implying that all such chains have originated as barchans.
Source: wiktionary
Seifs are longitudinal forms elongated parallel to the prevailing wind direction.
Source: wiktionary
Tsoar, H. Dynamic processes acting on a longitudinal (seif) sand dune .
Source: wiktionary
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.