Piggyback, piggy-back, or piggybacking may mean:

Transport

Piggyback (transportation) Piggyback transportation refers to the transportation of goods where one transportation unit is carried on the back of something else. It is a specialised form of intermodal transportation and combined transport. Etymology ''Piggyback'' is a ...

, something that is riding on the back of something else

Art, entertainment, and media

Splash cymbal piggybacking In a drum kit, splash cymbals are the smallest accent cymbals. Splash cymbals and china cymbals are the main types of effects cymbals. The most common sized splash has a diameter of 10", followed by 8". Most splash cymbals are in the size range o ...

, mounting a cymbal on top of an already stand-mounted cymbal * "Piggyback" (song), 2017 song by Melanie Martinez * Chapter Nine: The Piggyback, 2022 episode of ''Stranger Things''.

Business, finance, and law

Piggy-back (law) Piggy-back applies to contractual agreements in law, more specifically shareholder selling rights. To apply, a piggy-back clause must be included in a corporation's shareholder agreement, which is part of the incorporation materials. Because th ...

, shareholder selling rights * Piggybacking, a practice in which a person with bad credit uses the

seasoned tradeline A seasoned tradeline is a line of credit that the borrower has held open in good standing for a long period of time, typically at least two years. The "seasoned" part implies that the account is aged or that it has an established history. "Piggyba ...

of credit of someone else

Electronics

* Piggyback board, a

daughterboard In computing, an expansion card (also called an expansion board, adapter card, peripheral card or accessory card) is a printed circuit board that can be inserted into an electrical connector, or expansion slot (also referred to as a bus slo ...

Healthcare

* Piggybacking, a second infusion set onto the same intravenous line using a

Y-Set (intravenous therapy) In intravenous therapy a Y-Set, T-Set and V-Sets are Y, T and V shaped three-way connector sets made of connecting plastic tubes used for delivering intravenous drugs into the body from multiple fluid sources. As Y-Sets are the most common shaped s ...

* " Piggy-back technique", is a technique in liver transplantation in which the recipient

inferior vena cava The inferior vena cava is a large vein that carries the deoxygenated blood from the lower and middle body into the right atrium of the heart. It is formed by the joining of the right and the left common iliac veins, usually at the level of the ...

is preserved. * Vision Correction: The wearing of zero- or very-low-strength soft (daily disposable) contact lenses behind hard lenses if the hard lenses alone are uncomfortable or damaging to the cornea.

Science

Piggyback plant ''Tolmiea menziesii'' () is a species of flowering plant in the family Saxifragaceae. It is known by the common names youth on age, pick-a-back-plant, piggyback plant, and thousand mothers. It is a perennial plant native to the West Coast of Nort ...

, ''Tolmiea menziesii'' * Piggybacking, technique used in

astrophotography Astrophotography, also known as astronomical imaging, is the photography or imaging of astronomical objects, celestial events, or areas of the night sky. The first photograph of an astronomical object (the Moon) was taken in 1840, but it was no ...

* PiggyBac transposon system, a type of transposable DNA element

Security

Piggybacking (security) In security, piggybacking, similar to tailgating, refers to when a person tags along with another person who is authorized to gain entry into a restricted area, or pass a certain checkpoint. It can be either electronic or physical. The act may be ...

, when an authorized person allows (intentionally or unintentionally) others to pass through a secure door when they enter.

Telecommunications

Piggybacking (data transmission) In two-way communication, whenever a frame is received, the receiver waits and does not send the control frame (acknowledgment or ACK) back to the sender immediately. The receiver waits until its network layer passes in the next data packet. The d ...

, a bi-directional data transmission technique in network layer, sending data along with ACK called Piggybacking *

Piggybacking (Internet access) Piggybacking on Internet access is the practice of establishing a wireless Internet connection by using another subscriber's wireless Internet access service without the subscriber's explicit permission or knowledge. It is a legally and ethicall ...

, obtaining wireless access by bringing one's own computer within the range of another subscriber's service {{disambig