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noun any of numerous plants of the genus Gladiolus native chiefly to tropical and South Africa having sword-shaped leaves and one-sided spikes of brightly colored funnel-shaped flowers; widely cultivated
noun the large central part of the breastbone
originLearned borrowing from Latin gladiolus (“little sword, sword lily”), diminutive of gladius (“sword”). Compare Middle English gladiol, whence gladiole.
Etymology from Wiktionary, CC BY-SA 3.0