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Hemisphere Definition, Usage & Real-World Examples (2 meaning)
Meaning 1：Half of a sphere, especially Earth (hemisphere)
hemisphere
/ˈhemɪsfɪər/
n.
Half of the Earth, especially one of the halves north or south of the equator, or east or west of the Prime Meridian.
Half of a sphere, especially Earth
➕
/hæf əv ə sfɪər/
n.
Refers to one of two equal halves of a sphere, most commonly used to describe the Northern and Southern halves of the Earth divided by the equator, or the Eastern and Western halves divided by the Prime Meridian.
📘 Details & Usage
📖 Root Explanation
Comes from Greek 'hēmi-' meaning 'half' and 'sphaira' meaning 'sphere'.
💡 Mnemonic
Imagine cutting a ball (sphere) in half (hemi). You get two equal halves, like Earth or a brain.
📖 Example
When it's summer in the Northern Hemisphere, it's winter in the Southern Hemisphere.
The seasons are opposite in the Northern and Southern Hemispheres.
🔗 Collocations
Northern Hemisphere – The half of the Earth that lies north of the equator.
Southern Hemisphere – The half of the Earth that lies south of the equator.
Western Hemisphere – The half of the Earth that includes North and South America and the surrounding waters.
🔄 Synonyms
semi-sphere (n.) – A less common term for half of a sphere.
half-globe (n.) – A descriptive term for one half of a spherical object like Earth.
region (n.) – A broad area of the Earth's surface, can be used in a similar context for large zones.
🌱 Derivatives
hemispheric (adj.) – Relating to or shaped like a hemisphere.
hemispherical (adj.) – Having the shape of a hemisphere.
📖 Cultural Story
A scientific term derived from Latin 'hemisphaerium', which itself originates from the Ancient Greek 'hēmisphairion'. It entered English in the 16th century, reflecting the era's advances in geography and astronomy, used to precisely describe halves of celestial bodies and the brain.
Meaning 2：Half of a round object, especially the brain (hemisphere)
hemisphere
/ˈhemɪsfɪər/
n.
One of the two halves of the human brain, divided into left and right.
Half of a round object, especially the brain
➕
/hæf əv ə raʊnd ˈɑːbdʒɪkt/
n.
Refers to one of the two roughly symmetrical halves of a roughly spherical organ, most notably the left and right halves of the human brain, which have specialized functions.
📘 Details & Usage
📖 Example
The left hemisphere of the brain is often associated with language and analytical thinking.
Language processing is primarily handled by the brain's left half.
🔗 Collocations
cerebral hemisphere – One of the two halves (left or right) of the cerebrum, the largest part of the brain.
left hemisphere – The half of the brain typically dominant for language, logic, and analytical tasks.
right hemisphere – The half of the brain often associated with spatial awareness, creativity, and intuition.
🔄 Synonyms
🌱 Derivatives
hemispheric (adj.) – Relating to a hemisphere, e.g., hemispheric specialization of the brain.
hemispherical (adj.) – Shaped like a hemisphere.
interhemispheric (adj.) – Located between or connecting the two hemispheres, as in the brain's corpus callosum.
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