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| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
Clostridium Clos·trid·i·um (klŏ-strĭd'ē-əm)
n.
A genus of rod-shaped, spore-forming, chiefly anaerobic bacteria including the nitrogen-fixing bacteria found in soil and those causing botulism and tetanus.