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A sac is a small bag-shaped part inside a plant or an animal. It holds liquid or air. You meet it in biology class and at the doctor’s: an egg sac, a sac, a snake’s venom sac, the tiny air sacs in your lungs. It is a science word, not the everyday word for a bag you carry shopping — that word is sack, which looks almost the same and often sounds the same. A sac is usually soft, closed, and living inside a body. Though actually, scientists also use it for some tiny pouches that are not “bags” in the sense; they just mean a small hollow space with a wall around it.
（生物體內的）囊、袋狀構造（如液囊、氣囊、毒囊；不是購物袋的 sack）
組成Borrowed from French sac, “bag”. That French word goes back to Latin saccus, and further to an old Greek word for a coarse bag.
同家族的字
- sackthe everyday bag-word; both come from the same old word for a bag
原始詞典資料12 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
Sacname詞源 2
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informalThe city of Sacramento, California, United States.
sacnoun詞源 1/sæk/
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A bag or pouch inside a plant or animal that typically contains a fluid.
sacverb詞源 2/sæk/
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informalgamesTo sacrifice.
- Kasparov sacked his queen early on in the game to gain a positional advantage against Kramnik.
- I kept saccing monsters at the altar until I was rewarded with a new weapon.
sacnoun詞源 2/sæk/
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informalgamesA sacrifice.
- Kasparov's queen sac early in the game gained him a positional advantage against Kramnik.
sacnoun詞源 3/sæk/
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historicallawThe privilege, formerly enjoyed by the lord of a manor, of holding courts, trying causes, and imposing fines; now used only in the phrase sac and soc or soc and sac.
- But it is really the court-baron which represents the ancient assembly of the mark, while the court-leet represents the lord's jurisdiction of sac and soc, whether granted before or since the coming of William.
- In later times, if the lord had "sac and soc,” his court had the authority of the Court Leet; if he had the view of frankpledge the suitors at his court were free from attendance at the sheriff's tourn; his court was then in all points like the hundred court, but independent of the sheriff.
這個拼法也被記錄為下列字的變化形：
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。