Joint is not a math word it deals with Biology! It is the bone like knob in bones that let the body move and bend.
a part of a body part
justification and joint variation is one of the j math vocabularies.
Arthr
what does key mean in math
Approximately
about
a
I do not know of such a word related to math(s)
There is no such math word, so it does not mean anything. You may wish to check your spelling before posting questions!
The word at means the least
the word by means 'times' or 'multiply'
its mean like well its a math term its like distrubed fractions