aracho-, arachi-, arachid-, araki-

(Greek > Latin: legume; peanut)

Arachis [a leguminous plant, diminutive, arakis]: In botany, a small genus of mostly Brazilian herbs of the pea family (Fabaceae). They ripen their pods underground.

arachibutyrophobia (s) (noun) (no plural)
A morbid dread of peanut butter adhering to the roof of one’s mouth: Arachibutyrophobia is related to the fear of swallowing and gagging on this sticky paste or spread.
arachic, arachidic
1. Pertaining to or disignating a fatty acid that is found in the form of esters in the oil of the peanut (Arachis hypogaea), in butter, etc.
2. Pertaining to or obtained from leguminous plants of the genus Arachis.
arachidonic acid (s) (noun) (no pl)
1. In biochemistry, an unsaturated acid found in animal cells: Arachidonic acid is normally essential in nutrition and in the growth of mammals.

Arachidonic acid is found only in animal fats, as in egg yolk and liver.
2. Etymology: coined from the modern Latin stem arachid-, "peanut" (from Greek arakhos, "a type of leguminous plant".

In chemistry, a glyceryl ester of arachic acid.
Arachis hypogaea
The common peanut; when it isn't capitalized, it's a plant of this genus.
arachis oil
Peanut oil.