an arrow that is shot from a crossbow; has a head with four edges
an angry dispute; "they had a quarrel"; "they had words"
have a disagreement over something; "We quarreled over the question as to who discovered America"; "These two fellows are always scrapping over something"
the property of a more than adequate quantity or supply; "an age of abundance"
(chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million
(physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present
an accumulation of jobs not done or materials not processed that are yet to be dealt with (especially unfilled customer orders for products or services)