numer-, number-

(Latin: distribution; to count, to reckon)

electron lepton number (s) (noun), electron lepton numbers (pl)
The number of very small particles and associated neutrinos minus the number of positrons and associated antineutrinos: As an engineer, Mildred made a careful study of the electron lepton numbers during her analysis of colliding atoms in the air, noting that they were generating more electrons as well as x-rays and gamma rays.
electron number (s) (noun), electron numbers (pl)
The quantity of negative charges in atoms or ions: Jack and all the other chemistry students had to memorize the electron numbers from the chart that the teacher presented to them.
Electronic Numerical Integrator and Calculator, ENIAC
The first completely digital computer and an ancestor of most computers in use today: The Electronic Numerical Integrator and Calculator (ENIAC) was developed by Dr. John Mauchly and J. Presper Eckert during World War II at the Moore School of the University of Pennsylvania.

The massive ENIAC, which weighed 30 tons and filled an entire room, used some 18,000 vacuum tubes, 70,000 resistors, and 10,000 capacitors.

In December, 1945, it solved its first problem regarding the calculations for the hydrogen bomb. After its official unveiling in 1946, it was used to prepare artillery-shell trajectory tables and perform other military and scientific calculations.

enumerable (adjective), more enumerable, most enumerable
A reference to that which can be determined by counting: The enumerable amount of Maribel's student loan was calculated and she was trying to make arrangements for repaying it as soon as she could get a job.
enumerate (verb), enumerates; enumerated; enumerating
1. To count off or name one by one; to write down: The investigator enumerated the flaws of the politician.
2. To determine the quantity of; to tally: Brad enumerated his reasons for working on the project.
3. To specify individually: Janine enumerated the many obstacles she had encountered as she advanced to the position of CEO of the company.
4. To name several things on a list one by one: Dr. Jackson was enumerating the medications that Sam must take and the therapies he should do in order to get better.
enumeration (s) (noun), enumerations (pl)
1. The action of ascertaining the amount of something: The enumerations of the latest census of the country's population showed a big increase since the last enumeration.
2. A recapitulation of the heads or main points of an argument: Jim's attorney presented his enumerations of why Jim should not be convicted.
3. Etymology: from Latin enumeratus and enumerare, "to reckon up, count over, enumerate"; from ex- "from" + numerare, "to count, number"; from numerus, "number".
enumerator (s) (noun), enumerators (pl)
Someone who points out things separately, one after the other: Janet was an enumerator who was taking the attendance of university students in the biology class for the professor.
Horas non numero nisi serenas. (Latin motto)
Translation: "I count only the hours that are serene."

A 19th century motto which is located on a sundial near Venice by British essayist William Hazlitt.

Infinitus est numerus stultorum. (Latin motto)
Translation: "Infinite is the number of fools."
innumerable (adjective), more innumerable, most innumerable
Incapable of being summed up; not to be totaled up: The innumerable stars in the sky are obviously just too many to be calculated.

Regardless of what government officials claim, there are innumerable people in the world.

innumerably (adverb), more innumerably, most innumerably
Concerning that which is too multitudinous or cannot be estimated: An example of an innumerably excessive number would be snow flakes or hail falling during a winter storm and rain drops that fall when it is raining.
innumeracy (s) (noun), more innumeracy, most innumeracy
The inability to do or to deal with mathematical concepts and methods or related systems: Tyler's innumeracy was a personal embarrassment as he strived to become an accountant.
innumerate (i NOO muhr it, i NYOO muhr it) (s) (noun), innumerates (pl)
Anyone who lacks skills with mathematics: Mollie simply is an innumerate who can't comprehend how to deal with numbers and there are plenty of other innumerates who have the same lack of skills and understanding.
innumerate (adjective), more innumerate, most innumerate
Being unfamiliar with mathematical theories and formulas: As much as he regrets it, Gilbert is an innumerate person who is unable to understand or to do basic mathematics.
innumerous (adjective), more innumerous, most innumerous
A reference to being too many to be able to be calculated: The innumerous amount of the national debt was simply too excessive to be accurately determined.