GC: n

S: TRS – https://royalsocietypublishing.org/doi/abs/10.1098/rspb.1932.0078 (last access: 14 July 2020); NIH – https://ehp.niehs.nih.gov/doi/abs/10.1289/ehp.9087207 (last access: 14 July 2020).

N: 1. 1690s, “state of unconsciousness caused by a narcotic,” Modern Latin, from Greek narkōsis, from narkoun “to benumb” (see narcotic (n.)).
2.  State of stupor, unconsciousness, or arrested activity produced by the influence of narcotics or other chemical or physical agents— compare NITROGEN NARCOSIS.
3. Stupor or unconsciousness produced by narcotics or other materials.
4. It can be produced by sedatives, narcotics, anesthetics, or physical means.

S: 1. OED – https://www.etymonline.com/search?q=narcosis (last access: 14 July 2020). 2. MW – https://www.merriam-webster.com/dictionary/narcosis (last access: 14 July 2020). 3. TERMIUM PLUS – https://www.btb.termiumplus.gc.ca/tpv2alpha/alpha-eng.html?lang=eng&i=1&srchtxt=narcosis&codom2nd_wet=1#resultrecs (last access: 14 July 2020). 4. GDT – http://gdt.oqlf.gouv.qc.ca/ficheOqlf.aspx?Id_Fiche=2077205 (last access: 14 July 2020).

SYN:
S:

CR: narcolepsy, narcotic (2).