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They are easily identified by the red-brown cap fading to tan, white to lilac-gray gills, firm texture, and annulus (ring) around the stout stipe (stalk).
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Our last partial eclipse was Oct 23, 2014; the biggest one in recent memory is the May 10, 1994 annular eclipse (annular as in annulus = ring).
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Instead, for a few minutes the sun looks like a striking annulus, or ring, which is why an annular eclipse is also often called a ring of fire.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'annulus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of annulus
Medieval Latin, from Latin anulus finger ring, from anus ring — more at anus
NEW! Time Traveler
First Known Use: 1563
in the meaning defined at sense 1
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