Amino Acid

The organic compounds that combine, via peptide bond, to form proteins.

Amino acids must contain both an amino functional group and a carboxylic acid functional group bonded to the alpha carbon. The variation in amino acid composition results from the side chain that is also bonded to the alpha carbon. The fourth bond on the alpha carbon is a hydrogen.


In geometry:
A line that intersects a curve in at least 2 points.

In trigonometry:
In a right angle triangle, the secant of an angle is the length of the hypotenuse divided by the length of the adjacent side.


The application of a force on an object that results in the displacement of the object.

The force must be applied, at least in part, in the same direction as the displacement.


Most commonly the horizontal line above the repetend in a decimal.

Previously, it was used to indicate a group of terms in a mathematical expression. This has been replaced with parentheses.

Repetend: a repeated number or series of numbers; similarly, it is also means a repeated word or phrase.