also: くじらろう
spermaceti
A waxy substance obtained from the head cavity of sperm whales, historically used in candles, ointments, and cosmetics.
Spermaceti was once used as a material for candles.
この軟膏には鯨蝋が含まれている。
This ointment contains spermaceti.
Standard kanji form; 蝋 means 'wax'.
Mixed kanji-kana spelling; ろう is the kana for 蝋.
Kana spelling using the kun'yomi reading くじら for 鯨; less common than げいろう.
Compound of 鯨 (whale) and 蝋 (wax). The reading げいろう is on'yomi; くじらろう mixes kun'yomi and on'yomi.