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Webster 1913 Edition

Noun.

(Bot.)

(a)

The time at which each species of plants unfolds its leaves.

(b)

The act of bursting into leaf.

Milne. Martyn.

Noun.

[L. frondesco, from frons.]

In botany, the precise time of the year and month in which each species of plants unfolds its leaves.

frondescence ‎(uncountable)

(botany) The time at which a plant unfolds its leaves.
The act of bursting into leaf.

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