spicule
Noun
Meaning
A minute, slender granule, or point.
Same as Spicula.
Any small calcareous or siliceous body found in the tissues of various invertebrate animals, especially in sponges and in most Alcyonaria.
Source: Webster's dictionarySynonyms
spiculum
burr
quill
barb
briar
bramble
brier
spike
nettle
instrument
needle
filament
thorn
bristle
spurrier
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