recess (v.)
1809, from recess (n.). Related: Recessed; recessing.
recess (n.)
1530s, "act of receding," from Latin recessus "a going back, retreat," from recessum, past participle of recedere "to go back, fall back; withdraw, depart, retire," from re- "back" (see re-) + cedere "to go" (from PIE root *ked- "to go, yield"). Meaning "hidden or remote part" first recorded 1610s; that of "period of stopping from usual work" is from 1620s, probably from parliamentary notion of "recessing" into private chambers.
چفتهای که از تکرار و ترکیب چند چفتهی هممرکز همراه با پاکار و پایهی آنها حاصل میشود. در چفتهی چندلا، معمولاً لایهها از یکدیگر عقب مینشینند و در یک صفحه واقع نیستند
”چفتۀ چندلا ممکن است به منظور تقویت سازه یا بهمنظور تزیین ساخته شود.“