circannual

circannual — 形容詞

  • circannualpositive
  • more circannualcomparative
  • most circannualsuperlative

1. Returning or repeating on a cycle that is close to one year, especially in livin

1.形容詞C2
釋義

年週期的

以接近一年為循環的

Returning or repeating on a cycle that is close to one year, especially in living things or their body processes.

例句

The researchers tracked the bears' circannual sleep cycle from spring to winter.

研究人員從春天追蹤到冬天，觀察熊的年週期睡眠循環。

collocation: circannual sleep cycle

Naoko studies circannual changes in whale songs along the Pacific coast.

Naoko 研究太平洋沿岸鯨魚歌聲的年週期變化。

pattern: circannual changes in [thing]

同義詞
  • annual

    usually means exactly once a year, often for scheduled events rather than internal biological timing

  • yearly

    an everyday word for something that happens each year, without the scientific tone

  • seasonal

    broader and less exact, since it can describe patterns tied to part of the year rather than a full near-year cycle

文法句型

circannual + noun

be + circannual

用法筆記

Usually used in scientific or medical writing with words such as cycle, rhythm, pattern, or change. It often suggests an internal rhythm that runs close to a year, not simply an event on the calendar.

常見錯誤

❌The bird's migration is circannual, so it happens every day.
✅The bird's migration is circannual, so it follows a cycle close to one year.
💡'Circannual' describes a near-yearly cycle, not a daily one.
❌The plant has a circannual flower.
✅The plant has a circannual flowering cycle.
💡'Circannual' usually describes a cycle, rhythm, or pattern rather than a single object.