chirp. n. A short, high-pitched sound, such as the one a small bird or insect makes. intr.v. chirped, chirpÂ·ing, chirps. To make a short, high-pitched sound.
Flash memory is a type of nonvolatile memory that erases data in units called blocks. A block stored on a flash memory chip must be erased before data can be written, or programmed, to the microchip. Flash memory retains data for an extended period of time whether a flash-equipped device is powered on or off.
One of the primary formats for these portable memory sources is a microSD card, which is one of the smallest flash memory cards on the market. It is manufactured by SanDisk, which lends the SD to the name; the other part of the name comes from the tiny size of the card.