From Wiktionary, the free dictionary
chwarren (“gland”) + thyroid.
chwarren thyroid f (plural chwarennau thyroid, not mutable)
- thyroid gland[1]
- ^ 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, page 131