The amygdala is a part of the brain that is thought to process memory and emotions. Greek ἀμυγδαλη amugdalē means "almond", and the amygdala is so named because it is almond-shaped.
ἀμυγδαλη was borrowed into Latin as amygdala, becoming *amendola, then Italian mandorla, Portuguese amendoa. In Spanish and Old French it is almendra and alemandle. The al- prefix arose by confusing the initial a- with the Arabic article al- (which was found in other French and Spanish words). alemandle became Old French and English alemande, almaund, almond.