Terms with unexpected meanings, part 2

There is so much to learn from studying an old dictionary! Here are some other terms I found interesting recently. I hope you will, too.

* "poop" = one definition is "a short jarring sound; GULP, TOOT." Who ever expected "poop" to be basically equated with "gulp"? (I can tell you what I won't be drinking at 7-11 ever again....)

* "neurohemal organ" = "an organ (as a corpus cardiacum of an insect) that releases stored neurosecretory substances into the blood." This appears to be a broader definition than how the term is used now.

* "lib" =  (noun abbreviations) book; liberal; pound; library, librarian; (transitive verb) to castrate. While this word is now most associated with the women's lib movement in the USA, the original meaning of it, when not used as an abbreviation, was "to castrate." And, yes, castration can be surgical sterilization of men or women. I don't think "women's lib" was meant to be a nice nickname in the minds of some who used it....

* "far-red": this term was given two contradictory definitions in the 1971 dictionary: 1) "lying in the part of the infrared spectrum farthest from the red--used of radiations with wavelengths between 30 and about 1000 microns" and 2) "lying in the part of the infrared spectrum nearest to the red--used of radiations with wavelengths starting at about 0.8 micron." How does one word get defined in two obviously contradictory ways like that?

* "rig": again, this word was given two different-but-related meanings one right after the other within the same definition segment: 1) "the complete station of an amateur radio station" and 2) "a high fidelity sound system." No one would call a radio station and a stereo the same thing, but this definition appears to be doing just that.

* "mi contra fa" = "TRITONE--used in early contrapuntal music as an expression of caution to the musician against the use of dangerous intervals." That's what the dictionary says, dangerous. What is the significance of that? 

* "mhometer" = "an instrument for measuring conductance." I didn't know this was an available measuring device. It seems like we're always indirectly measuring conductance via resistance with an ohmmeter, but conductance is not the same thing as resistance. Shouldn't we measure conductance directly?

* "cretin": you have to see this one to believe it. Apparently, the writers/editors of this dictionary--Webster's Third New International Dictionary, 1971--at some point included person(s) with a big grudge against Christians.

[February 3, 2023 update on "cretin": I found a 1977 Webster's dictionary yesterday that claimed an "uncertain" origin for "cretin," and sandwiched it between two very rare words that were defined as "lying" and "deceit." Here's a photo of the excerpt: 

Dictionaries get treated as objective authorities, but they are written by ordinary people who can hold grudges and exhibit varying levels of honesty.]

And there you have today's installment of interesting word definitions.