olfactory bulb

noun

Definition of olfactory bulb

: a bulbous anterior projection of the olfactory lobe that is the place of termination of the olfactory nerves and is especially well developed in lower vertebrates (such as fishes)

Examples of olfactory bulb in a Sentence

Recent Examples on the Web Humans detect a scent when certain molecules enter the nose, plug into receptors and turn on neurons that send electrical signals to the brain’s olfactory bulb, just behind the eyes. Joanna Klein, New York Times, "It’s One of Autumn’s Best Scents, but Not Everyone Smells It," 26 Oct. 2019 Once through the plate, N. fowleri gets into the olfactory bulb—the structure in the forebrain involved in smell. Beth Mole, Ars Technica, "Brain-eating amoeba kills again—here’s how it kills and how to avoid it," 26 July 2019 Generally speaking, living birds with more olfactory receptors—proteins that bind with specific odor molecules—tend to have disproportionately large olfactory bulbs, the regions in their brains that process smells. Michael Greshko, National Geographic, "T. rex had an amazing sense of smell, gene study suggests," 12 June 2019 So Hughes and Finarelli combed the scientific literature for records of olfactory bulb sizes and measured brain-size ratios for 42 living birds, two extinct birds, the American alligator, and 28 extinct non-avian dinosaurs. Michael Greshko, National Geographic, "T. rex had an amazing sense of smell, gene study suggests," 12 June 2019 The olfactory bulb sends information to the amygdala, which is involved with experiencing emotions, and the hippocampus, the memory center. April Long, Marie Claire, "Aromatherapy Perfumes: Do They Really Work?," 20 Feb. 2019 The olfactory bulb — the area of the brain that processes odors — is tightly connected to the amygdala, which is where the brain reacts emotionally. Alessandra Potenza, The Verge, "Puke, poop, and sweat: a ranking of New York City’s grossest attractions," 9 May 2018 In fact, Braak and his colleagues also found Lewy bodies in the olfactory bulb, which led them to propose the nose as another potential place of initiation. Diana Kwon, Scientific American, "Does Parkinson’s Begin in the Gut?," 8 May 2018 Origins of Olfactory Inferiority The story begins in the brain—specifically the olfactory bulb, the brain's smell-processing center. Brian Handwerk, Smithsonian, "In Some Ways, Your Sense of Smell Is Actually Better Than a Dog’s," 22 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'olfactory bulb.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of olfactory bulb

1851, in the meaning defined above

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Time Traveler for olfactory bulb

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The first known use of olfactory bulb was in 1851

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Statistics for olfactory bulb

Last Updated

17 Nov 2019

Cite this Entry

“Olfactory bulb.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/olfactory%20bulb. Accessed 22 November 2019.

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More Definitions for olfactory bulb

olfactory bulb

noun

Medical Definition of olfactory bulb

: a bulbous anterior projection of the olfactory lobe that is the place of termination of the olfactory nerves

More from Merriam-Webster on olfactory bulb

Britannica.com: Encyclopedia article about olfactory bulb

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