Achillea millefolium or common yarrow, a flowering plant widespread in the temperate Northern Hemisphere, formerly and sometimes used to stanch the flow of blood.

plural of Canadian soldier

(US, regional) A mayfly. / Used other than figuratively or idiomatically: see Canadian, soldier.

plural of water soldier

Any of the species Stratiotes aloides, sole species of the genus Stratiotes of aquatic plants.

plural of soldier's woundwort

Picnomon acarna, a Eurasian thistle.

(humorous) Resistant to damage caused by soldiers.

Expressing exasperation or impatience with a situation.

(UK) Expressing exasperation or impatience with a situation.