be+a+rare+occurrence

См. также в других словарях:

• rare occurrence — index improbability, phenomenon (unusual occurrence) Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

• occurrence — oc|cur|rence [əˈkʌrəns US əˈkə: ] n 1.) something that happens →↑occurrence frequent/rare/common occurrence ▪ Laughter was a rare occurrence in his classroom. ▪ Flooding in the area is a common occurrence. 2.) [singular] the fact of something… …   Dictionary of contemporary English

• occurrence — noun 1 (C) something that happens: a common/rare/regular occurrence:: Flooding under this bridge is a common occurrence. | Laughter was a rare occurrence in his classroom. 2 (U) the fact of something happening: the frequent occurrence of violent… …   Longman dictionary of contemporary English

• occurrence — noun 1) vandalism used to be a rare occurrence Syn: event, incident, happening, phenomenon, affair, matter, circumstance 2) the occurrence of cancer increases with age Syn: existence, instance, appearance, manifesta …   Thesaurus of popular words

• occurrence — noun 1) a rare occurrence Syn: event, incident, happening, phenomenon, circumstance 2) the occurrence of cancer Syn: existence, instance, appearance, frequency, incidence, rate …   Synonyms and antonyms dictionary

• occurrence — [ ɔkyrɑ̃s ] n. f. • 1440; du lat. occurrere → occurrent 1 ♦ Littér. Cas, circonstance. « changeant de route suivant l occurrence » ( Balzac). Mod. (dans des loc.) EN L OCCURRENCE : dans le cas présent. La personne responsable, en l occurrence, M …   Encyclopédie Universelle

• Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare …   Wikipedia

• occurrence — noun ADJECTIVE ▪ common, everyday, widespread ▪ daily, frequent, regular ▪ rare, uncommon ▪ …   Collocations dictionary

• rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …   Universalium

• Rare Earth hypothesis — In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the emergence of complex multicellular life (metazoa) on Earth required an improbable combination of astrophysical and geological events and circumstances. The term… …   Wikipedia

• occurrence */*/ — UK [əˈkʌrəns] / US [əˈkɜrəns] noun Word forms occurrence : singular occurrence plural occurrences a) [countable] something that happens, especially something unexpected and unpleasant Unfortunately, computer errors are a common occurrence. b)… …   English dictionary