Word Ultra — Set 284

Set 284 of Word Ultra covers 5 words: peridrome, alluvion, perilune, eustress, nephrology. Each entry below includes its definition, an example sentence, and synonyms — practice them with the interactive cards above.

1. peridrome · noun/ˈpælɪnˌdroʊm/

   a word or phrase that can be read backward and forward

   A popular type of peridrome is the word 'racecar,' which reads the same forwards and backwards.

   Synonyms: palindrome, mirror word, symmetric word

   Origin: The word 'palindrome' originates from the Greek 'palin' meaning 'back' and 'dromos' meaning 'running', thus translating to 'running back again'.

2. alluvion · noun/əˈluːviən/

   the soil or sediment deposited by a river or other water body

   Farmers in the region rely on the rich alluvion deposited by the river to enhance their crop yields each season.

   Synonyms: silt, sediment, deposit

   Origin: From Latin 'alluviō', meaning 'a washing against', from 'alluviare', which means 'to wash against'.

3. perilune · noun/ˈpɛr.ɪ.luːn/

   the point in an orbit of a moon at which it is closest to the planet it orbits

   As the satellite approached its perilune, scientists were eagerly monitoring the gravitational effects it would have on the planet below.

   Synonyms: pericentre, perigee, periapsis

   Origin: The word 'perilune' is derived from the prefix 'peri-' meaning 'around' or 'near' combined with 'lune', which comes from the Latin 'luna' meaning 'moon'.

4. eustress · noun/ˌjuːˈstrɛs/

   positive stress that can motivate and improve performance

   Many athletes experience eustress before a big competition, as it helps them focus and perform at their best.

   Synonyms: positive stress,motivational stress,beneficial stress

   Origin: The term 'eustress' is derived from the Greek prefix 'eu-' meaning 'good' or 'well' combined with 'stress,' which comes from the Latin 'stringere' meaning 'to draw tight.'

5. nephrology · noun/nɛˈfrɑlədʒi/

   the branch of medicine that deals with the diagnosis and treatment of kidney diseases

   After being diagnosed with chronic kidney disease, she was referred to a specialist in nephrology for further treatment options.

   Synonyms: kidney medicine,kidneyology

   Origin: from Greek 'nephros' meaning kidney + '-logy' meaning study of