an essential fatty acid, C 20 H 32 O 2 , found in the lipids of most tissues, that is a precursor in the synthesis of prostaglandins, prostacyclins, and related effectors.
a fatty acid occurring in animal cells: the metabolic precursor of several groups of biologically active substances, including prostaglandins
arachidonic acid ar·a·chi·don·ic acid (ār’ə-kĭ-dŏn’ĭk)
An unsaturated fatty acid found in animal fats, that is essential in human nutrition and is a precursor in the biosynthesis of some prostaglandins.
noun See anandamide
- Arachis oil
. Historical Examples To cheapen this, peanut oil (arachis oil) may entirely replace the olive oil, or about 20 per cent. Soap-Making Manual E. G. Thomssen The “cold-drawn” arachis oil (pea-nut or earth-nut oil) has a pleasant flavour, resembling that of kidney beans. The Chemistry of Food and Nutrition A. W. Duncan
a Lydian woman who challenged Athena to a weaving contest and was changed into a spider for her presumption. Historical Examples The model so long sought in vain he had found in Ledscha, who in so many respects resembled Arachne. Arachne, Complete Georg Ebers Arachne, humiliated by the blow, and unable to avenge it, hanged […]
any wingless, carnivorous arthropod of the class Arachnida, including spiders, scorpions, mites, ticks, and daddy-longlegs, having a body divided into two parts, the cephalothorax and the abdomen, and having eight appendages and no antennae. Compare . belonging or pertaining to the arachnids. Contemporary Examples The scorpion, a Heterometrus spinifer, is completely edible, despite the arachnid […]