deuol

dau (“two”) +‎ -ol.

deuol (feminine singular deuol, plural deuol, not comparable)

1. dual
2. (mathematics, rare) bicimal, binimal, binal, binary fractional

• dwbl (“double”)
• deuaidd (“binary”)
• degol (“decimal”)

• heol ddeuol (“dual carriageway”)
• pwynt deuol (“bicimal point”)

Adapted from English diol, with phono-semantic matching to appear like an extension of Etymology 1.

deuol m (plural deuolau)

1. (organic chemistry) diol

• Delyth Prys, J.P.M. Jones, Owain Davies, Gruffudd Prys (2006) Y Termiadur: termau wedi'u safoni; standardised terminology‎^[1] (in Welsh), Cardiff: Awdurdod cymwysterau, cwricwlwm ac asesu Cymru (Qualifications curriculum & assessment authority for Wales), →ISBN
• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “deuol”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies