HELICES
\hˈɛlɪsɪz], \hˈɛlɪsɪz], \h_ˈɛ_l_ɪ_s_ɪ_z]\
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2010
- New Age Dictionary Database
By Oddity Software
1913
- Webster's Revised Unabridged Dictionary
By Noah Webster.
1920
- A dictionary of scientific terms (6th edition)
By J.H. Kenneth
