A topical antiseptic solution of iodine in alcohol; commonly used for disinfecting minor wounds.
from German Jodtinktur
I applied tincture of iodine to the scrape.
ヨウ素 is the element iodine itself, while ヨードチンキ is a specific medicinal preparation.
消毒液 is a general term for disinfectant liquid; ヨードチンキ is one specific type.
Standard katakana spelling; the word is usually written in kana.
Ateji spelling, rarely used.
From German 'Jodtinktur' (iodine tincture). The kanji 沃度丁幾 are ateji for the sounds.