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Pronunciation of 

optical

view main entry for opticaladjective biology  /ˈɒptɪk(ə)l/
British English pronunciation: opticalClick to listen to the pronunciation of optical

derived word

optically

  /ˈɒptɪkli/  adverb
British English pronunciation: opticallyClick to listen to the pronunciation of optically

dark pool

a method of financial trading in which share prices are hidden and not openly available to the public

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alms

money, food, or clothes given to poor people

Open Dictionary

subtweet

to post a tweet, usually a negative one, that mentions a person without using the @ sign, so that they will not see the message on their Twitter feed …

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