Definitions of molecular mass, molecular weight, molar mass and molar weight. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Clawback has a more general definition. For example, premiums paid on an insurance policy may be refunded (or clawed back) if the policy is cancelled in a certain time frame. Such an arrangement is specified in the contract and referred to as a clawback provision. Clawback. 1. A drop in a security's price after a previous rise. 2. Money that must be refunded or given back for some reason or other. The term especially applies to tax advantages extended to a taxpayer subject to certain conditions that the taxpayer did not fulfill. clawback. 1.
A claw is a curved, pointed appendage, found at the end of a toe or finger in most amniotes (mammals, reptiles, birds). Some invertebrates such as beetles and spiders have somewhat similar fine hooked structures at the end of the leg or tarsus for gripping a surface as the creature walks. Crabs', lobsters' and scorpions' pincers, or more formally, their chelae, are sometimes called claws. A true claw, is made of hard protein called keratin. Claws are used to catch and hold prey in carnivorous mammals such as cats and dogs, but may also be used for such purposes as digging, climbing trees, self-defense, and grooming, in those and other species.