But if you see it from the mathematical stand point:
less than -10 means colder, as
-11 < -10 (-11 is less than -10) is true

And that does not change above/below zero (but of course numbers change):
9 < 10 is true, whereas 10 < 11 is false.

So colder or less than may be used as synonyms, right?

Finally a reason to use Kelvin . . .

And also on topic, I need to hunt down that HDR palm tree that was my first photo project with my (at the time) new N900.

People are not rational beings and language (any!) is not exact.
"Less than -10" is often treated as short for "less cold that -10", which means "more than -10" in strictly mathematical terms.

I am not sure whether other languages suffer the same problem but English is really full of idiosyncrasies like that, when a word in a given context has the exact opposite meaning from the same word in isolation.
"There were quite a few people there" >>> few = many
"I soldered down the USB port to hold it fast" >>> fast = not moving at all

Haven't found that palm yet, but I don't think I've shared this foggy path through a cemetery before.

(And speaking of homophones, homonyms and homograms, consider raze and raise. The former can mean to demolish, the latter, to construct. Homophones yet antonyms.)

Weary nice pic!

Excellent photos guys.

And the palm tree finally!

palm_pregamma_1_fattal_alpha_1_beta_0.84_saturatio n_1.11_noiseredux_0.06_fftsolver_1_v2_gimped on Flickr

One of 8 HDR tonemaped images I made from the original 3 exposure bracket I took with my then new N900 using FCamera for the DNG output and auto-bracketing feature. I think this one is interesting without being too over-the-top.

(And in English, there's a word that's its own antonym! Technically, it's two words that are pronounced and spelled the same but are of opposite meaning in at least one sense.)

Ed...another from the palm series. The stippling and other artifacts in this one makes me think of a pen-and-ink drawing that's been tinted like an old postcard.

palm_pregamma_0 on Flickr

Street lamp. In the mourning ours.

Gotta love those mourning ours

I mourn mine all the time.

So, Mamish, all this time you were talking about a palm, you were talking about a tree?
I thought it was a phone!

Two words that are spelled and pronounced the same?
That's the same word!