Sac

/sæk/
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Thân thiện
Definition
  1. Noun:
    • A bag-like structure in a plant or animal: A sac is a part of an organism that is shaped like a pouch or bag and often contains fluid, air, or another substance.
    • An enclosed space or cavity: A sac can refer to any enclosed or confined area, often containing a specific substance like air or fluid.
    • (Capitalized) A member of a Native American people: When capitalized ("Sac"), it refers to a person belonging to the Algonquian people historically living in parts of what is now the Midwestern United States.
Examples of Usage
  • Noun (Biological Structure):
    • The pollen sac of the flower burst open.
    • Air sacs in the lungs are crucial for respiration.
  • Noun (Enclosed Space):
    • The geode had a small sac filled with crystals.
    • They discovered a sac of air in the cave.
  • Noun (Ethnic Group):
    • The Sac and Fox tribes were relocated in the 19th century.
Advanced Usage
  • "embryonic sac": In biology, the structure that surrounds and protects an embryo.
    • The embryonic sac provides nutrients to the developing fetus.
  • "lacrimal sac": In anatomy, the tear-draining sac in the inner corner of the eye.
    • A blocked lacrimal sac can cause excessive tearing.
Variants and Related Words
  • Saccate (adj): Having the form of a sac or pouch.
    • The saccate organ stores digestive enzymes.
  • Saccule (n): A small sac, especially within the vestibular system of the ear.
    • The saccule helps with balance.
Synonyms
  • Pouch: A small bag or sack-like structure.
  • Cyst: A closed sac in the body that may contain fluid or semi-solid material (often pathological).
  • Vesicle: A small fluid-filled sac or blister.
Related Phrases
  • Yolk sac: The membranous sac attached to an embryo, providing early nourishment.
    • The yolk sac is an important source of nutrition for bird and reptile embryos.
  • Amniotic sac: The fluid-filled sac that cushions the fetus during pregnancy.
    • The amniotic sac ruptured, signaling the start of labor.
Noun
  1. a structure resembling a bag in an animal
  2. a member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay
  3. a case or sheath especially a pollen sac or moss capsule
  4. an enclosed space
    • the trapped miners found a pocket of air

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