That's absurd. I don't begrudge you're belief, or the importance you place on the pro-life plank. However, you're not doing anyone a favor when you reinvent the language to suit your own needs.
We have a perfectly useful term to describe the pro-life position. We call it pro-life. Conservatism does not mean pro-life, but a whole host of issues, and I think most would agree that conservatism does embrace the pro-life plank. No arguement there.
However, when your definition hinges on the plank you wind up making a fool out of yourself by calling the guy who's anti-tax, pro-gun, pro-freedom, pro-military, ant-socialist, a liberal. Obviously, the liberals would drive this guy out of the liberal camp with torches and pitch forks.
Like it or not, conservatism is the sum of a lot of issues. When you find someone that embraces most (not all) of those issues, you've found someone who's more conservative than not. Period.
Actually, I wouldn't call "life rejecting" pro-gun, pro-military, etc. guy a liberal. I don't think he's a conservative, but I don't think he's a liberal either.
I do believe he rejects the clear language of the Declaration of Independence, and the most important part of it, that God has endowed us with rights which include "life, liberty, and the pursuit of happiness."
But, who cares if he's pro-gun if his parents took his life when he was 7 months old?
What should we call him? I'd probably call him a libertarian or a pro-liberty republican. But, I don't think he can possibly be a conservative.