Observable

Isolated material particles are abstractions, their properties being definable and observable only through their interaction with other systems.

This is the observable night of the Lord, when he brought them forth out of the land of Egypt: this night all the children of Israel must observe in their generations.

Earth is the center of the observable universe.

It's an easily observable fact that trans athletes do not outperform their cis competitors.

By a microscope, the bug will be seen to have eight legs, two feelers, and an abdomen something egg-shaped; colour livid red; and in size no bigger than the point of a small needle. They lacerate the epidermis in some way or other, as a small hole is observable where they have been seated; and cause extreme itching and considerable inflammation of the part.

The radius of the observable universe is about 46 billion light years. How many digits of pi would we need to calculate the circumference of a circle with a radius of 46 billion light years to an accuracy equal to the diameter of a hydrogen atom, the simplest atom? It turns out that 37 decimal places (38 digits, including the number 3 to the left of the decimal point) would be quite sufficient.

The strange new star was at the edge of the observable universe.

In 1913, in the same year that Mother's Day became a nationally observable holiday, the American people passed another milestone: for the first time in American history more than one person in one thousand was divorced.

Although intellectual property rights, such as patents, are highly observable, they are mostly limited to product technologies. Process technologies, or the routines endemic in the firm's production, are not readily observable, and thus cannot be easily imitated.

Temperature is an observable but entropy is derived.