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An Bunachar Náisiúnta Téarmaíochta don Ghaeilge
The National Terminology Database for Irish
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GAdia-optar fir1
gu dia-optair, ai dia-optair, gi dia-optar
diopter s in úsáid SAM/in use USA
measurement unit specifying the refractive power of a lens by representing the reciprocal of its focal length in metres, one dioptre being equivalent to the refractive power of a lens with a focal length of one metre