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genus Polypodium
genus Polypodium /pəˈlɒpɪdiəm/
noun
-
A genus of ferns belonging to the family Polypodiaceae and having rounded naked sori
(
genus Polypodium
, Polypodium
)
a genus of ferns belonging to the family Polypodiaceae and having rounded naked sori
reciprocating engine
reciprocating engine /rɪˈsɪprəkeɪtɪŋ ˈɛndʒɪn/
noun
-
An internal-combustion engine in which the crankshaft is turned by pistons moving up and down in cylinders
(
reciprocating engine
)
an internal-combustion engine in which the crankshaft is turned by pistons moving up and down in cylinders
Automobiles traditionally used the reciprocating engine, where pistons move up and down.
Automobiles traditionally used the reciprocating engine, where pistons move up and down.
military leader
military leader /ˈmɪlɪtɛri ˈliːdər/
noun
-
(military) a leader of military forces
(
military leader
)
(military) a leader of military forces
The military leader strategized the defense tactics during the war.
The military leader strategized the defense tactics during the war.
underskirt
underskirt /ˈʌndərˌskɜrt/
noun
-
Undergarment worn under a skirt
(
half-slip
, petticoat
, underskirt
)
undergarment worn under a skirt
