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helicline

American  
[hel-i-klahyn] / ˈhɛl ɪˌklaɪn /

noun

  1. a curved ramp.


helicline British  
/ ˈhɛlɪˌklaɪn /

noun

  1. architect a spiral-shaped ramp

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of helicline

heli(c)- + cline ( def. )