An adjective meaning 'to do with veins' — the tubes that carry blood back toward your heart. It is a medical and scientific word: doctors, nurses and biology books use it, and ordinary people almost never do. In everyday talk you would just say 'in the vein' or 'in my veins'.

An adjective meaning是個形容詞，意思是 'to do with veins'「跟靜脈有關」 the tubes that carry blood back toward your heart靜脈就是把血液帶回心臟的那些管子。It is a medical and scientific word這是醫學和科學用詞 : doctors, nurses and biology books use it醫生、護理師、生物書會用它 and而 ordinary people almost never do一般人幾乎不會用。In everyday talk日常說話 you would just say你只會說 'in the vein' or 'in my veins'「in the vein」或「in my veins」。

You meet it in fixed pairs: venous blood (the blood in your veins, darker because it carries less oxygen), a venous catheter (a thin tube put into a vein), venous return (how blood gets back to the heart).

You meet it你會在 in fixed pairs幾個固定搭配裡碰到它 : venous blood (the blood in your veins, darker because it carries less oxygen)venous blood（靜脈血，顏色較深，因為帶的氧氣較少） a venous catheter (a thin tube put into a vein)a venous catheter（放進靜脈的細管） venous return (how blood gets back to the heart)venous return（血液怎麼流回心臟）。

It is often set against arterial, which means 'to do with arteries' — the tubes carrying blood away from the heart.

It is often set against它常常拿來對照 arterial「arterial」 which means它的意思是 'to do with arteries'「跟動脈有關」 the tubes carrying blood away from the heart動脈是把血液從心臟帶出去的管子。

There is also a plant use: a leaf can be described as venous if it has many visible lines, though botanists more often say veined or venose for that. Deep vein thrombosis, a serious blood clot, is sometimes written in hospital notes as 'deep venous thrombosis' — same thing.

There is also a plant use植物上也有這個用法 : a leaf can be described as venous葉子有很多明顯的紋路時可以說是venous if it has many visible lines如果它有很多明顯的紋路 though botanists more often say veined or venose for that不過植物學家通常會用veined或venose來說這件事。Deep vein thrombosis, a serious blood clot「Deep vein thrombosis」這種嚴重血栓 is sometimes written in hospital notes醫院病歷有時候會寫成 as 'deep venous thrombosis'「deep venous thrombosis」 same thing意思一樣。