ortho-normal

or·tho·nor·mal

[awr-thuh-nawr-muhl]
adjective Mathematics.
1.
(of a system of functions) normal; normalized.
2.
(of a set of vectors) having the properties that any two vectors are perpendicular and that each vector has a length of one unit.

Origin:
1930–35; ortho- + normal

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Ortho-normal is always a great word to know.
So is ort. Does it mean:
the offspring of a zebra and a donkey.
a scrap or morsel of food left at a meal.
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