rotation
rotary motion | the act of rotating as if on an axis, the rotation of the dancer kept time with the music |
| seal | any of numerous marine mammals that come on shore to breed, chiefly of cold regions |
crabeater seal
crab-eating seal | silvery grey Antarctic seal subsisting on crustaceans |
| eared seal | pinniped mammal having external ear flaps and hind limbs used for locomotion on land, valued for its soft underfur |
| fur seal | eared seal of the southern hemisphere, the thick soft underfur is the source of sealskin, the male fur seal is much larger than the female |
guadalupe fur seal
Arctocephalus philippi | a fur seal of the Pacific coast of California and southward |
| fur seal | an eared seal of the northern Pacific |
Alaska fur seal
Callorhinus ursinus | of Pacific coast from Alaska southward to California |
earless seal
true seal
hair seal | any of several seals lacking external ear flaps and having a stiff hairlike coat with hind limbs reduced to swimming flippers |
harbor seal
common seal
Phoca vitulina | small spotted seal of coastal waters of the northern hemisphere |
harp seal
Pagophilus groenlandicus | common Arctic seal, the young are all white |
elephant seal
sea elephant | either of two large northern Atlantic earless seals having snouts like trunks |
bearded seal
squareflipper square flipper
Erignathus barbatus | medium-sized greyish to yellow seal with bristles each side of muzzle, of the Arctic Ocean |
hooded seal
bladdernose
Cystophora cristata | medium-sized blackish-grey seal with large inflatable sac on the head, of Arctic and northern Atlantic waters |
| break seal | a seal that must be broken when first used and cannot easily be resealed, it was stored in a tube with a break seal |
| cylinder piston chamber | a chamber within which piston moves |
| great seal | the principal seal of a government, symbolizing authority or sovereignty |
| Great Seal of the United States | the seal of the United States government |
piston
plunger | mechanical device that has a plunging or thrusting motion |
| piston ring | seal consisting of a split metal ring that seals the gap between a piston and the cylinder wall |
| piston rod | connecting rod that moves or is moved by a piston |
radial engine
rotary engine | an internalombustion engine having cylinders arranged radially around a central crankcase |
rotary actuator
positioner | (computer science) the actuator that moves a read
write head to the proper data track |
| rotary engine | an internalombustion engine in which power is transmitted directly to rotating components |
| rotary press | a printing press for printing from a revolving cylinder |
rotor blade
rotary wing | the long airfoil that rotates to provide the lift that supports a helicopter in the air |
seal
stamp | a device incised to make an impression, used to secure a closing or to authenticate documents |
| seal | fastener that provides a tight and perfect closure |
| seal | a finishing coat applied to exclude moisture |
| seal bomb | a small explosive device (resembling a firecracker) that is used underwater in order to frighten mammals away from fishing grounds |
sealing wax
seal | fastener consisting of a resinous composition that is plastic when warm, used for sealing documents and parcels and letters |
signet ring
seal ring | a ring bearing a signet |
synchronous converter
rotary rotary converter | electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa |
traffic circle
circle rotary
roundabout | a road junction at which traffic streams circularly around a central island, the accident blocked all traffic at the rotary |
Wankel engine
Wankel rotary engine
epitrochoidal engine | a rotary engine that is a four-stroke internalombustion engine without reciprocating parts |
pivot joint
rotary joint
rotatory joint
articulatio trochoidea | a freely moving joint in which movement is limited to rotation, the articulation of the radius and ulna in the arm is a pivot joint |
sealed instrument
contract under seal
special contract | a contract that is signed and has the (wax) seal of the signer attached |
cachet
seal
seal of approval | an indication of approved or superior status |
| seal | a stamp affixed to a document (as to attest to its authenticity or to seal it), the warrant bore the sheriff's seal |
Star of David
Shield of David
Magen David
Mogen David
Solomon's seal | a six-pointed star formed from two equilateral triangles, an emblem symbolizing Judaism |
Rotary Club
Rotary International | a group of businessmen in a town organized as a service club and to promote world peace |
apex solar apex
apex of the sun's way | the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars |
vertex
peak apex
acme | the highest point (of something), at the peak of the pyramid |
| Lord Privy Seal | the senior cabinet minister in the British Cabinet who has no official duties |
Navy SEAL
SEAL | a member of a Naval Special Warfare unit who is trained for unconventional warfare, SEAL is an acronym for Sea Air and Land |
Piston
Walter Piston | United States neoclassical composer (-) |
goldenseal
golden seal
yellow root
turmeric root
Hydrastis Canadensis | perennial herb of northeastern United States having a thick knotted yellow rootstock and large rounded leaves |
| Solomon's-seal | any of several plants of the genus Polygonatum having paired drooping yellowish-green flowers and a thick rootstock with scars shaped like Solomon's seal |
great Solomon's-seal
Polygonatum biflorum
Polygonatum commutatum | North American perennial herb with smooth foliage and drooping tubular greenish flowers |
phocomelia
seal limbs | an abnormality of development in which the upper part of an arm or leg is missing so the hands or feet are attached to the body like stumps, rare condition that results from taking thalidomide during pregnancy |