- GLOSSARY OF VOLCANIC TERMS
An individual vesicle which has been subsequently filled-in by secondary minerals.
Glossary of volcanic terms. - University of Wisconsin Oshkosh. G. J. Hudak. 2001.
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amygdule — [ə mig′do͞ol΄, ə mig′dyo͞ol΄] n. [< L amygdala, ALMOND: from the typical shape] a small gas pocket, usually found in volcanic rock, partly or completely filled with a mineral, esp. a zeolite, calcite, or quartz: sometimes called amygdale [ə… … English World dictionary
Amygdule — Amygdules form when the vesicular cavities (created by expanding gas bubbles in volcanic lava) are filled with a secondary mineral such as calcite, quartz, chlorite or one of the zeolites, which are deposited by having minerals wash through the… … Wikipedia
amygdule — /euh mig doohl, dyoohl/, n. Petrol. one of the mineral nodules in an amygdaloid. [1875 80; AMYGD(ALA) + ULE] * * * Secondary deposit of minerals found in a rounded, elongated, or almond shaped cavity in volcanic rock. The cavities (vesicles) were … Universalium
amygdule — noun A rounded mass of secondary mineral found in volcanic rock … Wiktionary
amygdule — amyg·dule … English syllables
amygdule — /əˈmɪgdjul/ (say uh migdyoohl) noun → amygdale … Australian English dictionary
amygdule — … Useful english dictionary
pipe amygdule — noun : an elongated nodule resembling a tube in an amygdaloid … Useful english dictionary
amygdale — a·myg·dale (ə mĭgʹdāl) n. An amygdule. [From Latin amygdala, almond. See amygdala.] * * * … Universalium
igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary … Universalium