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