Definition of Ipswichian in English:

Ipswichian

adjective

  • Relating to or denoting the most recent interglacial period of the Pleistocene in Britain, preceding the Devensian glaciation and identified with the Eemian of northern Europe.

    ‘the breaching of the chalk ridge occurred rapidly during the previous Ipswichian interglacial’
    • ‘This rate of erosion would suggest that the breaching of the chalk ridge occurred rapidly during the previous Ipswichian interglacial, when nearly half of the gap between the present Isle of Purbeck and Isle of Wight would have developed.’
    • ‘Preceding and separating the cold glacial periods were three main interglacials (Cromerian, Hoxnian, and Ipswichian) when the climate was rather warmer.’
    • ‘The history of the last glacial-inlerglacial cycle in west Cumbria is better understood than preceding cycles, and an outline chronology from the Ipswichian onwards is given in Table 1.’
    • ‘It is clear that, although significant erosion has occurred since the Ipswichian, the resultant effect on land elevation is not very marked.’
    • ‘The spruce, which characterises this period on the continent, is absent from British Ipswichian sites.’

noun

the Ipswichian
  • The most recent interglacial period of the Pleistocene in Britain or the system of deposits laid down during it.

    ‘significant erosion has occurred since the Ipswichian’

Origin

1950s from Ipswich, the type site, + -ian.

Pronunciation

Ipswichian

/ɪpˈswɪtʃɪən/