An abbreviation (from Latin brevis, meaning short) is a shortened form of a word or phrase by any method. It may consist of letters or words taken from the full version of the word or phrase.
Absinthe is an anise-flavored spirit derived from plants, including the flowers and leaves of Artemisia absinthium ("grand wormwood"), together with green anise, sweet fennel, and other medicinal and culinary herbs.
Actinium is a chemical element with the symbol Ac and atomic number 89. It was first isolated by Friedrich Oskar Giesel in 1902, who gave it the name emanium. The element got its name by being wrongly identified with a substance André-Louis Debierne found and called actinium.
Addition (usually signified by the plus symbol +) is one of the four basic operations of arithmetic, the other three being subtraction, multiplication, and division. The addition of two whole numbers results in the total amount or sum of those values combined. The example in the adjacent image shows a combination of three apples and two apples, making five apples. This observation is equivalent to the mathematical expression "3 + 2 = 5" (that is, "3 plus 2 is equal to 5").