Refers to the vegetable leek (Allium porrum). Often used in cooking contexts. Cross-referenced with ポワロー and リーキ, which are alternative names.
Let's put some leeks in tonight's soup.
Leeks become sweet when simmered.
Common katakana spelling; usually written in kana.
Kanji spelling is rare; the word is almost always written in kana.
From French 'poireau' (leek) combined with Japanese 葱 (ねぎ, 'green onion'). The katakana spelling ポロネギ is standard.