gill

Noun
  1. A British imperial capacity unit (liquid or dry) equal to 5 fluid ounces or 142.066 cubic centimeters (synset 113642941)
    hypernym: british capacity unit, imperial capacity unit - a unit of measure for capacity officially adopted in the British Imperial System; British units are both dry and wet
    part holonym: fluid ounce, fluidounce - a British imperial unit of capacity or volume (liquid or dry) equal to 8 fluid drams or 28.416 cubic centimeters (1.734 cubic inches)
    part meronym: pint - a British imperial capacity measure (liquid or dry) equal to 4 gills or 568.26 cubic centimeters
  2. A United States liquid unit equal to 4 fluid ounces (synset 113640309)
    hypernym: united states liquid unit - a liquid unit officially adopted in the United States Customary System
    part holonym: fluid ounce, fluidounce - a United States unit of capacity or volume equal to 1.804 cubic inches
    part meronym: cup - a United States liquid unit equal to 8 fluid ounces
  3. Any of the radiating leaflike spore-producing structures on the underside of the cap of a mushroom or similar fungus (synset 113032439)
    hypernym: plant organ - a functional and structural unit of a plant or fungus
    synonym: lamella
  4. Respiratory organ of aquatic animals that breathe oxygen dissolved in water (synset 102513400)
    hypernym: respiratory organ - any organ involved in the process of respiration
    hyponym:
    • ctenidium - comb-like respiratory structure serving as the gill of certain mollusks
    • ceras - one of the often brightly colored and branching hornlike structures on the back of the nudibranch (and other related mollusks) that serve as gills
    • external gill - occurs in some mollusks and in tadpoles and other immature amphibians
    synonym: branchia

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