lumen

ルーメン

光源が出す目に見える光の総量を表す単位。

やさしい英語で： A unit used to measure the total amount of visible light a source gives out.

• This lamp produces 800 lumens.
• Compare the lumen ratings before buying a bulb.
• How many lumens do we need for this room?

よく使う表現： lumen output, lumen rating, one lumen

内腔

血管や腸など、管状の臓器の内部にある空間。

やさしい英語で： The open space inside a tube-shaped organ, such as a blood vessel or the intestine.

• Blood flows through the vessel's lumen.
• Swelling narrowed the intestinal lumen.
• The surgeon checked for a blockage inside the lumen.

類義語： cavity, channel

よく使う表現： arterial lumen, intestinal lumen, narrow lumen

内腔、管腔

管や針などの器具の内部にある空洞の通路。

やさしい英語で： The hollow channel inside a tube, needle, or similar device.

• The catheter has a narrow lumen.
• A blockage stopped fluid passing through the needle's lumen.
• Flush each lumen before connecting the tube.

類義語： bore, channel

よく使う表現： catheter lumen, needle lumen, single lumen

細胞内腔

植物の細胞壁に囲まれた内部の空間。

やさしい英語で： The space enclosed by the wall of a plant cell.

• The cell has a wide lumen.
• The microscope revealed the lumen inside each wood fiber.
• Thicker cell walls leave less space in the lumen.

類義語： cell cavity

よく使う表現： cell lumen, fiber lumen, wide lumen