submarinism en · NOUN
Etymology
From submarine + -ism.
Meanings
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(dated, uncountable) The use of submarines in warfare.
Adopting the counsel of despair, they resolved on the campaign of unrestricted submarinism which, their Admiralty advised them, would bring the United Kingdom to the verge of starvation by April.
1919, Maninda Chandra Sinha, Writings and Speeches, page 36: