egoma (type of perilla)
Archaic name for the plant Perilla frutescens var. frutescens. In modern Japanese, the plant is almost always referred to as 荏胡麻 (えごま). This standalone form is rare and mainly found in historical or botanical contexts.
See also: エゴマ
In old documents, the single character 荏 can refer to egoma.
perilla oil
Archaic single-kanji form for egoma; now mostly encountered in the compound 荏胡麻 (えごま).
The kanji 荏 is a phono-semantic compound; the exact derivation of the Japanese reading え is uncertain. Historically used as a single-character name for the egoma plant.