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Webster 1913 Edition

Adj.

[

Sept

i- +

insular

Consisting of seven islands;

as, the

septinsular

republic of the Ionian Isles

Adj.

[L. septum, seven, and insula, isle.] Consisting of seven isles; as the septinsular republic of the Ionian isles.

septinsular ‎(not comparable)

consisting of seven islands