noun
folds; wrinkles; creases
Technical or literary term for folds, pleats, or wrinkles, especially in geology (mountain folds) or anatomy. Rare in everyday speech; 折り目 or しわ are more common.
褶襞山脈は、地殻変動によって形成された。
Fold mountains were formed by crustal movements.
この岩石には細かい褶襞が見られる。
Fine folds can be seen in this rock.
Compound of 褶 (pleat, fold) and 襞 (fold, crease). Both kanji are rare and carry similar meanings, reinforcing the idea of folding. The exact historical derivation is uncertain; the word is primarily used in technical contexts.