Meaning of "quantitas terminata"

[Carolus Raeticus]

Salvete!

I need a little help with the expression quantitas terminata. I stumbled upon it in a sort of preface to Schott's Cursus Mathematicus dealing with the etymology of the name of mathematics and its nature. A little bit of context:

Merito mirantur nonnulli, cur inter omnes humanas divinasque scientias, sola illa, quae circa quantitatem terminatam, tanquam circa proprium, ac sibi peculiare objectum versatur, communiterque a primis jam saeculis Mathematica appellatur, hoc sibi nomen, quod aliis commune esse debebat, tanquam proprium usurpet, non vulgi errore, sed sapientum omnium decreto.
[...]
Objectum Mathematicae quod attinet, in confesso apud omnes est, quantitatem terminatam id esse, (ut jam insinuavi) tam continuam, quam discretam.
[...]
Ex dictis colligitur, quae sit Mathematicae essentia seu natura; est quippe scientia tractans de quantitate terminata, eaque vel a sensibili materia abstractâ, vel eidem immersâ.

I just do not understand what quantitas terminata is supposed to mean in this context. Isn't any science terminata, i.e. restricted? What does it mean?

Valete,

Carolus Raeticus

[adrianus]

terminata quantitas versus quantitatem indeterminatam
Anglicè est "bounded entity or quantity (which is measurable)" vs. "unbounded or indeterminate entity or quantity"

[Carolus Raeticus]

Salve Adriane!

Thank you for the hint.

Vale,

Carolus Raeticus