Truly wonderful question, wwcj. Beyond Raman, I've noticed that usage in the works of many Eastern European scientists these days, as well as scientists from places like India, who regularly make "spirituality" a general class of direct human experience.
My most favorite Eastern European of all is the Hungarian astrophysicist, Attila Grandpierre. An early contributor to Integrative Science, Grandpierre routinely refers to such things as "reason" and "knowledge" and "experience" and "feeling" and even the state of "ecstasy" as being members of the master set, "Spiritual Things."
Maybe it's a problem of Hungarian-to-English translation. Maybe the distinction is critical to understanding his argument.
The point is to keep the definitions clear. Hopefully the on-going clarification of precisely such definitions will be relevant to the purposes of the present discussion.