alternate


Concise Oxford English Dictionary © 2008 Oxford University Press:
alternate
verb /ˈɔːltəneɪt, ˈɒl-/ occur or do in turn repeatedly.

■ change repeatedly between two contrasting conditions.

adjective /ɔːlˈtəːnət, ɒl-/ 
  • 1 every other.

    ■ (of two things) each following and succeeded by the other in a regular pattern.

    Botany (of leaves or shoots) placed alternately on the two sides of the stem.

noun /ɔːlˈtəːnət, ɒl-/ N. Amer. a deputy or substitute.
– derivatives
alternately adverb,
alternation noun.
– origin C16 (earlier (ME) as alternation): from L. alternare (see alternative).
usage: The use of alternate to mean alternative is common in North American English, though still generally regarded as incorrect in Britain.
'alternate' also found in these Oxford entries:

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