I would say, if we lived in a world where people were logical (which as previously stated, is not this world) I would define an "e-cigarette" as a vaporizer that is designed to look like a cigarette --- just like an "e-cigar" is a vaporizer designed to look like a cigar and an "e-pipe" is a vaporizer designed to look like a tobacco pipe.
And in this hypothetical world, I would define "personal vaporizer" as a vaporizer that is customized to it's owner's individual personality. As someone pointed out, the term "personal vaporizer" is redundant if the 'personal' simply means that you don't share the vaporizer with others - because that is implied --- but it isn't redundant if 'personal' means something more than that, like reflecting the owner's individuality.
Under this set of definitions, "e-cigarette", "e-cigar", and "personal vaporizer" would be three very distinct categories -- of which I'd have a hard time imagining any intersection. Now there probably still would be a considerable intersection between "e-pipes" and "personal vaporizers", though the two wouldn't be synonymous.
So the question would be - what do we call vaporizers that are not designed to look like anything that one would smoke by combustion (therefore not "e-cigarettes", "e-cigars" or "e-pipes") but also not customized to an individual's personality (therefore not a "personal vaporizer") either?
By the way, I noticed some people here using the term "analog" to refer to devices that one smokes by combustion. This is an incorrect use of the term "analog" -- as "analog" is not the opposite of "electric", but of "digital". Not all electric things are digital. Many electric things are also analog --- including vaporizers. Yes, there are *some* cases where you will have a vaporizer *accessory* that is digital (like those accessories that measure nicotine consumption and communicate it via bluetooth to your iPhone) but vaporizers *themselves* are still analog devices.
I would suggest that if you want to use a term specifically to refer to devices that work by burning a leaf (be it tobacco, sage or cloves) so as to allow the smoke to be inhaled into the lungs (or just into the mouth, depending on what your technique is) a more accurate term would be "combustion-based".
And in this hypothetical world, I would define "personal vaporizer" as a vaporizer that is customized to it's owner's individual personality. As someone pointed out, the term "personal vaporizer" is redundant if the 'personal' simply means that you don't share the vaporizer with others - because that is implied --- but it isn't redundant if 'personal' means something more than that, like reflecting the owner's individuality.
Under this set of definitions, "e-cigarette", "e-cigar", and "personal vaporizer" would be three very distinct categories -- of which I'd have a hard time imagining any intersection. Now there probably still would be a considerable intersection between "e-pipes" and "personal vaporizers", though the two wouldn't be synonymous.
So the question would be - what do we call vaporizers that are not designed to look like anything that one would smoke by combustion (therefore not "e-cigarettes", "e-cigars" or "e-pipes") but also not customized to an individual's personality (therefore not a "personal vaporizer") either?
By the way, I noticed some people here using the term "analog" to refer to devices that one smokes by combustion. This is an incorrect use of the term "analog" -- as "analog" is not the opposite of "electric", but of "digital". Not all electric things are digital. Many electric things are also analog --- including vaporizers. Yes, there are *some* cases where you will have a vaporizer *accessory* that is digital (like those accessories that measure nicotine consumption and communicate it via bluetooth to your iPhone) but vaporizers *themselves* are still analog devices.
I would suggest that if you want to use a term specifically to refer to devices that work by burning a leaf (be it tobacco, sage or cloves) so as to allow the smoke to be inhaled into the lungs (or just into the mouth, depending on what your technique is) a more accurate term would be "combustion-based".