tohu oro
1. (noun) vowel.
Nāna i whakamana te whakamau atu o te tohutō hei whakaatu i ngā tohu oro roa, he pai kē atu ki a ia tēnei tikanga i te mahi whakahuarua kē i ngā tohu oro (TTR 2000:168). / He authorised the use of macrons to indicate long vowels. He preferred this method over doubling the vowel.
See also oropuare