a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds
"the dog barked all night"
同义词：
domestic dog
Canis familiaris
a dull unattractive unpleasant girl or woman
"she's a real dog"
同义词：
frump
informal term for a man
"you lucky dog"
someone who is morally reprehensible
"you dirty dog"
同义词：
cad
bounder
blackguard
hound
heel
a smooth-textured sausage of minced beef or pork usually smoked; often served on a bread roll
同义词：
frank
frankfurter
hotdog
hot dog
wiener
wienerwurst
weenie
a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward
同义词：
pawl
detent
click
metal supports for logs in a fireplace
同义词：
andiron
firedog
dog-iron