: anterior to or involving the anterior part of a frontal structure
a prefrontal bone

prefrontal

2 of 2

noun

: a prefrontal part (such as a bone)

Examples of prefrontal in a Sentence

Recent Examples on the Web
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Adjective
The technology-bilingualism argument is neurologically grounded and observationally compelling, but the causal chain from prefrontal developmental timing to technological rupture to career outcomes has not been formally tested. Nick Lichtenberg, Fortune, 3 July 2026 Researchers have shown that when something about an environment is familiar and aligns with your prior experiences, the prefrontal regions of your brain – those responsible for executive functions such as decision-making – become more active. Paulina Maxim, The Conversation, 11 May 2026
Noun
Dehaene and Changeux postulated that the workspace is instantiated by a network of pyramidal (excitatory) neurons linked to far-flung cortical regions, in particular the prefrontal, parietotemporal and midline (cingulate) associative areas. Christof Koch, Scientific American, 1 Dec. 2019 When corrected to brain size, the domesticated rabbits' amygdala's were roughly 9-10% smaller, while their medial prefrontal cortices were about 11-12% bigger. Christie Wilcox, Discover Magazine, 27 June 2018 See All Example Sentences for prefrontal

Word History

First Known Use

Adjective

1851, in the meaning defined above

Noun

1851, in the meaning defined above

Time Traveler
The first known use of prefrontal was in 1851

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Cite this Entry

“Prefrontal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prefrontal. Accessed 11 Jul. 2026.

Medical Definition

prefrontal

adjective
1
: situated or occurring anterior to a frontal structure
a prefrontal bone
2
: of, relating to, or constituting the prefrontal lobe or prefrontal cortex of the brain
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