amygdale
/əˈmɪɡdeɪl
/noun Geology
A vesicle in an igneous rock, containing secondary minerals.Segregation vesicles are therefore distinguished from amygdales because they are infilled with chilled magma, whereas amygdales represent the infilling of vesicles from post-emplacement fluids....
- Some consist of pear-shaped segregation vesicles with amygdales at their upper margin.
- If, after the lava has cooled and set, the vesicles are filled with minerals, they are known as amygdales.
Origin
Late 19th century: from French, from Latin amygdala (see amygdala).
- malperformance
- malpighiaceous
- Malpighian
- Malpighian body
- Malpighian cell
- Malpighian corpuscle
- Malpighian layer
- Malpighian tube
- Malpighian tubule
- Malpighi, Marcello
- malpita
- malpitte
- Malplaquet, Battle of
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- Malraux, André
- malrotation
- MALS
- malt
- Malta