A perfect standard of beauty, intellect etc., or a standard of excellence to aim at.
A subsemigroup with the property that if any semigroup element outside of it is added to any one of its members, the result must lie outside of it.
A subring closed under multiplication by its containing ring.
A non-empty lower set (of a partially ordered set) which is closed under binary suprema (a.k.a. joins).
A collection of sets, considered small or negligible, such that every subset of each member and the union of any two members are also members of the collection.
A Lie subalgebra (subspace that is closed under the Lie bracket) 𝖍 of a given Lie algebra 𝖌 such that the Lie bracket [𝖌,𝖍] is a subset of 𝖍.
Not actually present, but considered as present when limits at infinity are included.
Optimal; being the best possibility.
Existing only in the mind; conceptual, imaginary.
Pertaining to ideas, or to a given idea.
Perfect, flawless, having no defects.
Teaching or relating to the doctrine of idealism.
A constituent of character or capacity; quality; faculty; talent; usually in the plural with a collective sense.
A unit of relative proportion in a mixture.
The melody played or sung by a particular instrument, voice, or group of instruments or voices, within a polyphonic piece.
Share, especially of a profit.
A section of a document.
Duty; responsibility.
Each of two contrasting sides of an argument, debate etc.; "hand".
A group inside a larger group.
In the Hebrew lunisolar calendar, a unit of time equivalent to 3⅓ seconds.
The dividing line formed by combing the hair in different directions.
A fraction of a whole.
Position or role (especially in a play).
A distinct element of something larger.
3.5 centiliters of one ingredient in a mixed drink.
A section of land; an area of a country or other territory; region.
A room in a public building, especially a courtroom.
To separate by a process of extraction, elimination, or secretion.
To leave (an IRC channel).
To cut hair with a parting; shed.
To leave the company of.
To divide in two.
To be divided in two or separated; shed.
To separate or disunite; to remove from contact or contiguity; to sunder.
Fractional; partial.
Partly; partially; fractionally.