Perpetual debenture
noun
1.
a bond or debenture that can either never be redeemed or cannot be redeemed on demand
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- Perpetual inventory
noun 1. a form of stock control in which running records are kept of all acquisitions and disposals
- Perpetuality
[per-pech-oo-uh l] /pərˈpɛtʃ u əl/ adjective 1. continuing or enduring forever; everlasting. 2. lasting an indefinitely long time: perpetual snow. 3. continuing or continued without intermission or interruption; ceaseless: a perpetual stream of visitors all day. 4. blooming almost continuously throughout the season or the year. noun 5. a hybrid rose that is perpetual. 6. […]
- Perpetually
[per-pech-oo-uh l] /pərˈpɛtʃ u əl/ adjective 1. continuing or enduring forever; everlasting. 2. lasting an indefinitely long time: perpetual snow. 3. continuing or continued without intermission or interruption; ceaseless: a perpetual stream of visitors all day. 4. blooming almost continuously throughout the season or the year. noun 5. a hybrid rose that is perpetual. 6. […]
- Perpetual-motion
noun, Mechanics. 1. the motion of a theoretical mechanism that, without any losses due to friction or other forms of dissipation of energy, would continue to operate indefinitely at the same rate without any external energy being applied to it. noun 1. Also called perpetual motion of the first kind. motion of a hypothetical mechanism […]
- Perpetual-motion machine
A machine that could run forever. A perpetual-motion machine would have to produce at least as much energy as was needed for its operation. According to the second law of thermodynamics, such a machine is impossible, and to date none has ever been successfully demonstrated.