What is "glissaded"

Usage examples of "glissaded".

Nirgal joined the others and dropped over the rim and then they were all in a mad descent, clacking and jumping, and though Nirgal’s legs were rubbery his endless days of lung-gom now served him well, for he dropped past most of the others as he hopped down boulders and glissaded down little rockslides, jumping, holding balance, using his hands, making great desperate leaps, like everyone else utterly locked into the moment, into the striving for a quick descent without a bad fall.

Nirgal joined the others and dropped over the rim and then they were all in a mad descent, clacking and jumping, and though Nirgal's legs were rubbery his endless days of lung-gom now served him well, for he dropped past most of the others as he hopped down boulders and glissaded down little rockslides, jumping, holding balance, using his hands, making great desperate leaps, like everyone else utterly locked into the moment, into the striving for a quick descent without a bad fall.

A seal raised its head snake-like from a rock, and then with a jerking movement reached ' the weed growth at the edge and glissaded without a splash into the water.