shamrock

definition: clover native to Ireland with yellowish flowers
example: often considered the true or original shamrock
speech part: noun
synonyms: hop clover
definition: creeping European clover having white to pink flowers and bright green leaves
example:
speech part: noun
synonyms: white clover dutch clover
definition: Eurasian plant with heart-shaped trifoliate leaves and white purple-veined flowers
example:
speech part: noun
synonyms: common wood sorrel cuckoo bread

How shamrock is being used?