Interface - The agreed upon way that a function is called. Example: The toaster, microwave oven, and blender in my home all have the same US 120 volt 60 Hertz interface. I can use any plug on the counter for any of them. Facade Pattern / Bridge Pattern - A go-between between 2 interfaces.
Germline Gene Transfer. Gene transfer represents a relatively new possibility for the treatment of rare genetic disorders and common multifactorial diseases by changing the expression of a person's genes. Typically gene transfer involves using a vector such as a virus to deliver a therapeutic gene to the appropriate target cells.
The actual process of this transfer can be by any mechanism, but because genes are not passing by descent, horizontal gene transfer (abbreviated as HGT) is always very different from vertical gene transfer.