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bulb
has definitions from the fields of anatomy,zoology,neuroscience,botany
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[ noun ] (botany) a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
Used in print (Edward Austin Walton, "On Education for the Interior...)Instead they learn their dissection on the bulbs of plants . (Sallie Bingham, "Moving Day," The Atlantic...)She had dug a hole for each bulb , each tree wore a tag with her writing on_it ; where would she go for her gardening now ? |
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[ noun ] electric lamp consisting of a glass bulb containing a wire filament (usually tungsten) that emits light when heated
Used in print (The Family Fallout Shelter. Office of Civil and Defence...)Continuous low-level lighting may be provided in the shelter by_means_of a 4 - cell hot-shot battery to which is wired a 150 - milliampere flashlight type bulb . (Alex Gordon, The Cipher....)He paused on the landing to steady his breathing and_then bent to examine the single door by the light of the weak bulb overhead . Related terms |
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[ noun ] a rounded part of a cylindrical instrument (usually at one end)
Examples "the bulb of a syringe" Used in print (1961 Research Highlights of the National Bureau of...)However , the surface temperature_gradient can produce erroneous vapor-pressure measurements for the bulk liquid helium unless precautions are taken to isolate the tube ( which passes_through the surface to the vapor_pressure bulb ) from the liquid helium surface . Related terms |
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[ noun ] (anatomy,zoology,neuroscience) lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)
Synonyms Examples "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning" Related terms |
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[ noun ] (anatomy,zoology) a rounded dilation or expansion in a canal or vessel or organ
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