seta

Japanese: seta
seta

…If you follow this flow of hair in the opposite direction, it will form a whorl at the top of the head, which is what we call a “whorl.” [Akio Yamauchi]
[Invertebrate hair]
Thin hair-like projections that grow from the dermal cells of insect skin are called setas or stingers. Although they are usually hollow, the hairs (venomous stingers) of the larvae of the tussock moth and the scaly moth are filled with venom, and if they pierce human skin, they easily break and the venom leaks out, causing redness, swelling, and intense pain.

*Some of the terminology explanations that mention "seta" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このような毛の流れを逆向きにたどると頭頂部で渦巻となるが,これがいわゆる“つむじ”である。【山内 昭雄】
【無脊椎動物の毛】
 昆虫の皮膚の真皮細胞から生じる細い毛状突起を剛毛setaまたは刺毛hairという。普通は中空であるが,ドクガやイラガの幼虫の毛(毒刺)には毒液が満ちていて,ヒトの皮膚に突き刺さればたやすく折れて毒液がしみ出るので,赤くはれ,はげしい痛みを感じる。…

※「seta」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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