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Cirrostomicirrostratus
cirrostratus cloud
Cirrous
Cirrus
cirrus cloud
Cirrus Logic
Cirsium
Cirsium arvense
Cirsium discolor
Cirsium eriophorum
Cirsium flodmanii
Cirsium helenioides
Cirsium heterophylum
Cirsium lanceolatum
Cirsium rivulare
-- Cirsium vulgare --
Cirsocele
Cirsoid
Cirsoid aneurism
Cirsotomy
CIS
Cis-
Cisalpine
Cisatlantic
CISC
Cisco
Cisco Systems, Inc.
CISE
Ciselure
CISI
CISKA
Cisleithan
Cirsium vulgare
| Noun | 1. |  Cirsium vulgare - European thistle with rather large heads and prickly leaves; extensively naturalized as a weed in the United States |