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adorn to beautify, as with ornaments. [2 definitions]
adornment the act of adorning or state of being adorned. [2 definitions]
ADP a biochemical compound involved in the storing and releasing of energy in all living cells; adenosine diphosphate. (Cf. ATP.)
adrenal of or pertaining to glands located near the kidneys that produce the hormone epinephrine. [3 definitions]
adrenal gland either of two small glands of different shapes, located above the kidneys, that secrete adrenaline and various steroid hormones.
Adrenalin trademark for the synthesized or extracted form of epinephrine.
adrenaline the hormone secreted by the adrenal glands; epinephrine.
adrenocorticotropic able to stimulate the cortex of the adrenal glands.
Adriatic Sea an extension of the Mediterranean between Italy, Bosnia and Herzegovina, and Croatia.
adrift not anchored, as a boat; drifting. [4 definitions]
adroit skillful with the hands; dextrous. [2 definitions]
a drop in the bucket a small amount compared to what is needed.
adsorb to gather (a gas or liquid) to a surface. (Cf. absorb.)
adsorbable combined form of adsorb.
adsorption the condensation or adhesion of a gas, vapor, liquid, or dissolved substance on the surface of a solid or liquid. (Cf. absorption.)
adulate to flatter or admire excessively.
adulation extreme or excessive praise.
adult having grown to maturity. [6 definitions]
adult education a noncredit course of study for adults that offers instruction in a variety of subjects, typically offered by a university or college extension or by a community-based organization.
adulterant something that, when added to a substance, makes the substance impure or inferior. [2 definitions]
adulterate to make worse or impure by adding unnecessary or inferior ingredients. [3 definitions]