Final answer:
An intermediate-level disinfectant is capable of killing vegetative cells and certain enveloped viruses but cannot kill endospores.
Step-by-step explanation:
The germicide that can kill vegetative cells and certain enveloped viruses but not endospores is referred to as an intermediate-level disinfectant. High-level germicides are able to kill vegetative cells, fungi, viruses, including endospores, leading to sterilization. However, low-level germicides can only kill vegetative cells and some enveloped viruses, proving ineffective against endospores. Therefore, the germicide in question, which cannot kill endospores but can kill vegetative cells and certain enveloped viruses, fits the description of an intermediate-level disinfectant.