spaghetti squash
A type of winter squash whose flesh separates into spaghetti-like strands when cooked.
When you boil spaghetti squash, the inside becomes like noodles.
Full katakana spelling, also encountered.
Kanji spelling is rare and may not be widely recognized; the kana form is strongly preferred.
From そうめん (sōmen, thin wheat noodles) + カボチャ (kabocha, pumpkin/squash), referring to the noodle-like strands of the cooked flesh.