Mac-

Mac-

a prefix found in many family names of Irish or Scottish gaelic origin, as MacBride and Macdonald.
Also, Mc-, Mc-, M'-.

Origin:
< Irish, Scots Gaelic mac son, Old Irish macc; akin to Welsh, Cornish mab

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World English Dictionary
Mac-, Mc- or M'-
 
—prefix
(in surnames of Scottish or Irish Gaelic origin) son of: MacDonald; MacNeice
 
[from Goidelic mac son of; compare Welsh mab, Cornish mab]
 
Mc-, Mc- or M'-
 
—prefix
 
[from Goidelic mac son of; compare Welsh mab, Cornish mab]
 
M'-, Mc- or M'-
 
—prefix
 
[from Goidelic mac son of; compare Welsh mab, Cornish mab]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Mac- is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
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