Incorrect spelling, explanation: the abbreviation approx. is correct while aprox. is not due to several reasons related to standard usage, language conventions, and clarity. Approx. comes from approximately, and the abbreviation maintains the beginning letters of the original word (appro-). This makes it more recognizable and consistent with the full word. Aprox. deviates from the original word’s structure. It omits the second -p in approximately, which can lead to confusion or misunderstanding.

Correct spelling, explanation: the abbreviation approx. comes from the full word approximately, which has its roots in Latin. The word approximately is derived from the Latin word approximare, which means to come near or to approach. Approximare itself comes from ad- (toward) and proximus (nearest), with proximus coming from prope (near). Approx. is derived by taking the first few letters of approximately while preserving the core elements (appro-) of the original word. Aprox. is not standard and does not follow the traditional abbreviation pattern.

Definition of approx.:
Adverb, abbreviation for approximately, which is used to show that something is almost, but not completely, accurate or exact
The event will last for approx. two hours, so plan accordingly.
The cost of the new software is approx. $250, depending on the features you choose.

Collocations with approx.:
Some of the most commonly used collocations include:
Approx. value: refers to an estimated monetary worth of an object, property, or asset.
The painting has an approx. value of $2 million.
Approx. size: used to estimate the dimensions or magnitude of an object or space.
The storage unit has an approx. size of 300 square feet.
Approx. number: used to provide an estimated count or quantity.
There were approx. 200 people at the event.
Approx. date: used to suggest an estimated or rough time frame or calendar date.
The product launch is scheduled for an approx. date in early October.