What do you call the random Gaussian vectors in compressed sensing? Let $(e_i)_{1\leq i\leq M}$ be vectors with zero-mean i.i.d. entries from a Gaussian distribution. In a compressed-sensing setup, I have observed the collection of scalar products $(\langle x\, |\, e_i\rangle)_{1\leq i\leq M}$ for an unknown vector $x$.

In the compressed sensing literature, what is the name for the collection of vectors   $(e_i)_{1\leq i\leq M}$?
The collection of scalar products is often called measurement. The collection of vectors (each being an atom) can be called measurement dictionaries or sensing dictionaries. This is not specific to random atoms.