Minima

noun

1. The lowest limit.

   "We need a minimum of three staff members on duty at all time."

2. The smallest amount.

   "He always tries to get away with doing the minimum."

3. A period of minimum brightness or energy intensity (of a star).

   "The Maunder minimum of the Sun reportedly corresponded to a period of great cold on Earth."

4. A lower bound of a set which is also an element of that set.
5. The smallest member of a batch or sample or the lower bound of a probability distribution.