Of or relating to structures that are almond-shaped or resembling an amygdala.
From amygdaloid + -al (relating to). This extended form adds the -al suffix to the already-suffixed amygdaloid, creating an adjective suitable for more formal anatomical description.
This is what happens when scientists want to be extra precise—amygdaloid is already an adjective meaning 'almond-shaped,' but adding -al makes it even more formally 'relating to that which is almond-shaped,' like the difference between 'historic' and 'historical.'
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