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单词 alternation of generations
释义

alternate /olˈ or ölˈtər-nāt, also alˈ, formerly (eg Milton) -tûrˈ/

transitive verb

To cause to follow by turns or one after the other (properly, of two things)

intransitive verb
  1. To follow or interchange (with each other; properly, of two things)
  2. To happen by turns, change by turns
noun
  1. A deputy, substitute
  2. An alternative
adjective /-tûrˈ or (N American) ölˈ/
  1. Arranged or coming one after the other by turns
  2. Every other or second
  3. Sometimes used with the sense ‘alternative’
  4. (of leaves) placed singly with change of side at each node
  5. (of parts of a flower) each placed opposite the space between other parts of the flower
  6. (of angles) placed one after the other on either side of a line (geometry)
ORIGIN: L alternāre, -ātum, from alter one or other of two

alterˈnance (or /alˈ/) noun

  1. Alternation, interchange or variation
  2. Training by alternate periods of theoretical and practical work

alterˈnant or alˈternant adjective

Alternating

noun
  1. A spelling or sound variant that does not affect meaning (allomorph or allophone)
  2. A type of determinant (mathematics)
  3. An alternative proposition, eg one of the components in an alternation (logic)

alterˈnately adverb

alˈternating adjective

alternāˈtion noun

  1. The act of alternating
  2. Alternate succession
  3. Interchange
  4. The type of disjunction in which ‘or’ is used inclusively (logic)
  5. Reading or singing antiphonally

alˈternātor noun

A generator of alternating current

alternate energy see renewable energy under renew

alternate host noun (biology)

One of the two or more hosts of a parasite which has the different stages of its life cycle in unrelated hosts (cf alternative host)

alternating current noun

An electric current that periodically reverses its direction

alternation of generations noun (biology)

The occurrence in a life cycle of two or more different forms in successive generations, the offspring being unlike the parents, and commonly reproducing by a different method

generation /jen-ə-rāˈshən/

noun
  1. Production or originating
  2. A single stage of natural descent
  3. The people of the same age or period
  4. Descendants removed by the same number of steps from a common ancestor
  5. The ordinary time interval between the births of successive generations (usu reckoned at 30 or 33 years)
  6. Any of a number of stages, levels or series, generally in which each stage, etc is seen as a development of or improvement on the preceding one
  7. A term used in describing the development of computers (see first generation under first, fifth generation under fifth)
  8. Any series of files, each one an amended and updated version of the previous one (computing)
  9. Offspring or progeny (obsolete)
  10. A race, kind, class, family (obsolete)
  11. (in pl) genealogy, history (Bible)
ORIGIN: L generātiō, -ōnis, from generāre (see generate)

generaˈtional adjective

generāˈtionism noun

Traducianism

generation gap noun

Lack of communication and understanding, or the observable differences in attitudes, ideals or outlook, between one generation and the next

Generation X noun

The people who became adults in the early 1990s, considered apathetic or sceptical about traditionally held beliefs and values, esp relating to work and the family

Generation Xˈer noun

A member of Generation X

alternation of generations see under alternate

spontaneous generation

The origination of living from non-living matter
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更新时间：2025/3/23 8:50:05