spic·​ule | \ˈspi-(ˌ)kyül \

Definition of spicule 

1 : a slender pointed usually hard body especially : one of the minute calcareous or siliceous bodies that support the tissue of various invertebrates (such as sponges)

2 : a spikelike short-lived prominence appearing close to the chromosphere of the solar atmosphere

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Other Words from spicule

spicular \ˈspi-​kyə-​lər \ adjective
spiculation \ˌspi-​kyə-​ˈlā-​shən \ noun

Examples of spicule in a Sentence

Recent Examples on the Web

The spicules surge thousands of miles high, passing through the chromosphere and into the sun’s corona before collapsing. Nicholas St. Fleur, New York Times, "Solving the Scorching Mystery of the Sun’s Erupting Plasma Jets," 23 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'spicule.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of spicule

1785, in the meaning defined at sense 1

History and Etymology for spicule

New Latin spicula & Latin spiculum; New Latin spicula, alteration of Latin spiculum head of a spear or arrow, diminutive of spicum, spica ear of grain

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Time Traveler for spicule

The first known use of spicule was in 1785

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More Definitions for spicule


spic·​ule | \ˈspik-(ˌ)yü(ə)l \

Medical Definition of spicule 

: a minute slender pointed usually hard body (as of bone)

More from Merriam-Webster on spicule

Britannica.com: Encyclopedia article about spicule

Comments on spicule

What made you want to look up spicule? Please tell us where you read or heard it (including the quote, if possible).


living or existing for a long time

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