blue copperas
- noun
- /bluː ˈkʌpərəs/
- Archaic
:
cobre azul
- Large blue crystals of blue copperas formed on the bottom of the beaker.
Examples
-
The laboratory ordered a fresh supply of blue copperas for their experiments.
-
Historically, blue copperas was also used as a dye in textile production.
-
The lab uses blue copperas for various experiments.
-
Did you know that blue copperas is a form of copper sulfate?
-
The laboratory ordered a fresh supply of blue copperas for their experiments.
-
Large blue crystals of blue copperas formed on the bottom of the beaker.
-
Historically, blue copperas was also used as a dye in textile production.
Synonyms
1
7.8
A blue crystal chemical used to kill fungus on plants and in chemistry
1
4.6
A bright blue salt used to kill fungus on plants and for simple lab work
A blue crystal chemical that people use to kill plant fungus and in science experiments
A bright blue chemical in crystals used in gardens and labs to kill fungus and test liquids
A bright blue mineral of copper that forms crystals in dry places
Surface Forms
Morphology
blue + copperas
This is a simple color + noun composition: 'blue' describes the color of the substance 'copperas', so the phrase denotes the blue form of that chemical. Even though 'copperas' is rare/archaic and missing from the provided dictionary, the adjective-noun pattern is compositionally transparent and cross-linguistically common, so a learner who knows both constituents would infer the meaning.
Etymology
Blue copperas gets its name from two simple ideas: the bright blue crystals people saw and the old word copperas for a 'metal salt' used to make dyes. So the name came to mean the blue crystalline chemical now used in chemistry and industry.