citronem
Citronem is a term that appears to be a misspelling or a less common variation of "citronella". Citronella is a natural insect repellent derived from the oils of certain grasses, most notably Cymbopogon nardus and Cymbopogon winterianus. These grasses are native to Asia and are widely cultivated for their aromatic properties.
The essential oil extracted from citronella grass has a strong, lemony scent and is a well-known component
Beyond its insect-repelling qualities, citronella oil also has applications in aromatherapy for its mood-lifting and stress-reducing