Mono is 1, Stereo is 2, what is 3?

adjectives numbers

Solution 1:

The words 'triscopic' and 'triscopy' appear in the heading of a scientific paper and in the text of a medical paper but I have not been able to find such words in the OED or Merriam Webster.

Development of X-ray triscopic imaging system towards three-dimensional measurements of dynamical samples

IOPscience.org

Is routine triple endoscopy cost-effective in head and neck cancer? ..... cost-effectiveness of routine triscopy in every patient with head and neck cancer.

Science Direct

Related

Tenses in sentences with more than two verbs
At hand or in hand? [closed]
Is this imperative sentence wrong: "Make sure you wouldn't use the stairs"?
Structure after All/What with predicative complement
A word for "mapping existing steps into a larger future plan that commences now"
What is a "zip-zap"?
"Daydream(ing)" Vs "Woolgather(ing)" Vs "Fantasizing" [closed]
When to drop AD and BC from dates?
Terminology for expert who didn't go to college to study it
My worries turned to none/nothing
That vs Which (Solved using Gerund)
Single word preferable in business context to replace "for the sake of it"