spicule
Sponge skeletal element
A spicule is a small, needle-like structure.
In biology, spicules form the skeletal framework of sponges and some other invertebrates—tiny calcareous or siliceous shards that give the organism shape and support.
In astronomy, spicules are jets of plasma shooting up from the sun's surface.
The word applies broadly to any sharp, slender projection: bone spicules, ice spicules.
Absorbent cleaning material
- siliceousContaining or resembling quartz
- calciumElement twenty, builds bones
- archaeocyteSponge's stem cell
- calcareousContainingite calcium carbonate chalk
Diminutive skeletal element
- calcificationMineral hardening of tissue
- trabecularHaving internal latticework
- cartilageFlexible connective body tissue
- osteocyteBone-maintaining cell in matrix
mineralization · collagen · skeletal · vertebrate · echinoderm · starfish · test · endoskeleton
Stellar atmospheric zone
- photosphereStar's light-emitting surface
- coronaStar's outermost atmosphere
- plasmaElectrified matter state
- jetForced fluid stream
filament · prominence · sunspot · magnetic · ejection · helium · hydrogen · granulation
Silicon dioxide compound
- calciteCrystalline calcium carbonate
- aragoniteCalcium carbonate crystal form
- crystallineClear, ordered, brilliant
- latticeOpenwork of crossed strips
formation · precipitate · nucleation · growth · axis · symmetry · deposit · concretion
sharp
Fine-edged, or astute
bristle · thorn · prickle · barb · projection · hair · ray · acicular · elongated · tapering
sponge
Absorbent cleaning material
- siliceousContaining or resembling quartz
- calciumElement twenty, builds bones
- archaeocyteSponge's stem cell
ossicle
Diminutive skeletal element
- calcificationMineral hardening of tissue
- trabecularHaving internal latticework
- cartilageFlexible connective body tissue
osteocyte · mineralization · collagen · skeletal · vertebrate · echinoderm · starfish · test · endoskeleton · plate
chromosphere
Stellar atmospheric zone
- photosphereStar's light-emitting surface
- coronaStar's outermost atmosphere
- plasmaElectrified matter state
jet · filament · prominence · sunspot · magnetic · ejection · helium · hydrogen · granulation · convection
silica
Silicon dioxide compound
- calciteCrystalline calcium carbonate
- aragoniteCalcium carbonate crystal form
- crystallineClear, ordered, brilliant
lattice · formation · precipitate · nucleation · growth · axis · symmetry · deposit · concretion · accretion
- prominencesprotuberance, protrusion, bulge, bump, swelling
- stellar anatomycore, corona, chromosphere, photosphere, sunspot
- sharp thingspointed, sharp, spiky, thorn, needle
- cnidarianssea anemone, corals, stony coral, moon jelly, jellyfish
- marine anatomytentacle, tentacles, fin, fins, gill
- protective structuresexoskeleton, carapace, shell, cuticle, elytra