Calcareous is an adjective meaning mostly or partly composed of calcium carbonate, in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines.
"Calcareous" is used as an adjectival term applied to anatomical structures which are made primarily of calcium carbonate, in animals such as gastropods, i.e., snails, specifically about such structures as the operculum, the clausilium, and the love dart.
The term also applies to the calcium carbonate tests of often more or less microscopic Foraminifera. Note that not all tests are calcareous; diatoms and radiolaria have siliceous tests.
The Molluscs are calcareous, as are Calcareous sponges are sponges (Porifera), that have spicules which are made of calcium carbonate.
Calcareous grassland is a form of grassland characteristic of soils containing a lot of calcium carbonate from underlying chalk or limestone rock. Species of algae such as the green-segmented genus Halimeda are calcareous.
Flee like a bird to your mountain
For the wicked bend their bows
And they load their guns and shoot from the shadows
At an upright and righteous man
Run to Your arms like a baby
When the whole world closes in
Now a righteous man, now he loves his brother
And the wicked, wicked man, now he loves hate
And on the wicked He will reign
On the wicked God will reign and reign
On the wicked He will reign
On the wicked God will reign and reign and reign
Pray for the child in the city, yeah
'Cause the city's lost it's mind
There's a dangerous cloud on the horizon
And the tear's will fall like rain from the sky
And on the wicked He will reign
On the wicked God will reign and reign
On the wicked He will reign
On the wicked God will reign and reign and reign
Now the righteous man, he loves his brother
And the wicked, wicked man, he still loves hate
And on the wicked He will reign
On the wicked God will reign and reign
On the wicked He will reign
On the wicked God will reign and reign
And on the wicked He will reign
On the wicked God will reign and reign
On the wicked He will reign
On the wicked God will reign and reign and reign
Flee like a bird to your mountain