These are generically referred to as, not surprisingly; 'interstellar clouds'
An interstellar cloud made of gas, dust, and plasma in a galaxy.
A diffuse mass of interstellar dust and gas is known as a nebula. Nebulae are often regions where new stars are forming, as the dust and gas are the raw materials from which stars are born. They can vary in size, shape, and composition.
Interstellar extinction refers to the absorption and scattering of light by interstellar dust and gas, which can obscure or dim the light coming from distant astronomical objects. This phenomenon can make it challenging to observe or study these objects in detail.
A cloud of interstellar gas or dust is a region in space where particles of gas or dust are concentrated. These clouds can vary in size and density and play a crucial role in the formation of stars and planets. They can also give rise to spectacular astronomical phenomena like nebulas.
These are generically referred to as, not surprisingly; 'interstellar clouds'
The word "nebula" is often used for this.
Nebula
With all due respect, an interstellar cloud is, by its definition, gas, plasma and/or dust (molecular particulates) in greater quantities than normally found in interstellar space. So, perhaps the answer is No, because there are other elements present.
in large quantities yes...
That would be a nebula, which is an interstellar cloud of hydrogen gas, dust, and plasma. It is the first stage of a star's cycle.
An interstellar cloud made of gas, dust, and plasma in a galaxy.
Interstellar gas and dust.
A diffuse mass of interstellar dust and gas is known as a nebula. Nebulae are often regions where new stars are forming, as the dust and gas are the raw materials from which stars are born. They can vary in size, shape, and composition.
One consequence of dust in the interstellar medium is causing reddening of starlight due to scattering and absorption.
A large amount of gas and dust spread out in an immense volume is called a nebula. Nebulas are vast clouds of interstellar material where new stars are born.
Interstellar dust