In te reo Māori, macrons are known as tohutō: tohu meaning a sign or a symbol, tō meaning to pull or heave: they are symbols that stretch.
Tohutō are essential in written reo Māori because their addition or omission can either change or remove meaning from a word. Despite this, tohutō are frequently omitted from text in newspapers, on road-signs and everything in between. Sometimes, the change in meaning can have disastrous results!