Noun order isoetales has 1 sense
  1. Isoetales, order Isoetales - aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales
    --1 is a kind of plant order
    --1 is a member of Lycopsida, class Lycopsida, Lycopodiate, class Lycopodiate
    --1 has members: Isoetaceae, family Isoetaceae, quillwort family
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