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A volcanic rock containing many amygdules.
adj. also a·myg·da·loi·dal (-loi′dl)
1. Shaped like an almond.
2. Anatomy Of or relating to the amygdala.
3. Resembling a volcanic rock that contains many amygdules.

[Latin amygdala, almond; see amygdala + -oid.]


(Geological Science) a volcanic igneous rock containing amygdales
1. having the shape of an almond
2. (Geological Science) a less common form of amygdaloidal1


(əˈmɪg dəˌlɔɪd)

1. a volcanic rock in which rounded cavities formed by the expansion of gas or steam have later become filled with deposits of various minerals.
2. Also, a•myg`da•loi′dal. almond-shaped.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.amygdaloid - volcanic rock in which rounded cavities formed by expanding gas have subsequently become filled with mineral deposits
volcanic rock - extrusive igneous rock solidified near or on the surface of the Earth
Adj.1.amygdaloid - shaped like an almondamygdaloid - shaped like an almond    
rounded - curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders"
References in periodicals archive ?
Regulation of neuropathic pain behavior by amygdaloid TRPC4/C5 channels.
Recovery after chronic stress fails to reverse amygdaloid neuronal hypertrophy and enhanced anxiety-like behavior.
Effects of oxytocin microinjected into the central amygdaloid nucleus and bed nucleus of stria terminalis on maternal aggressive behavior in rats.
12) In alternative psychosis, amygdaloid and limbic kindling has been proposed as the mechanism that causes psychosis once seizures are well controlled.
They address the role of the amygdala in the early development of behavior, research on the amygdala and fear in rodents, the neuroanatomical organization of the amygdaloid complex, studies on nonhuman primates affecting current understanding of the role of the amygdala in emotional regulation, studies on rhesus monkeys, the effects of losing amygdala function in relation to anxiety and cognitive and emotional behavior, Urbach-Wiethe syndrome, amygdala removal for epilepsy, and the role of the amygdala in psychiatric disorders.
Evolution of the amygdaloid complex in vertebrates, with special reference to the anamnio-amniotic transition.
Sapolsky, "Acute corticosterone treatment is sufficient to induce anxiety and amygdaloid dendritic hypertrophy," Proceedings of the National Academy of Sciences of the United States of America, vol.
Anatomic basis of amygdaloid and hippocampal volume measurement by magnetic resonance imaging," Neurology, vol.
Potential corticotropin-releasing factor pathways in the rat brain as determined by bilateral electrolytic lesions of the central amygdaloid nucleus and paraventricular nucleus of the hypothalamus.
The multisensory regions at the cortex are mainly located in the parietal lobe, temporal lobe, frontal lobe, and insular, whereas the regions beneath the cortex are mainly located in the superior colliculus, and basal ganglia (globus pallidus, caudate nucleus, putamen nucleus, amygdaloid body, claustrum nucleus).
Recognizing (and labeling, naming, "tagging") the emotion (eg, sad, hurt, angry, embarrassed); this engages frontal lobe processes that diminishes amygdaloid limbic system overactivity (1)
Amaral DG, Price JL, Pitkanen A, Carmichael ST, 1992, Anatomical organization of the primate amygdaloid complex.