Today's words

Several from the Dictionary Devil that I could tell were new(ish), and one that surprised me. Let's start with the marginally familiar ones:

exiguity /ˌeg-zi-ˈgyü-ə-tē/ - the quality or state of being exiguous : SCANTINESS

I've definitely encountered this word before, and without sufficient context it chases me to the dictionary every time

pyrrhic /ˈpir-ik/ - a metrical foot consisting of two short or unaccented syllables

I was familiar with the adjective that describes a heavy-priced victory, and believe I'd encountered this noun before but don't remember for certain

vinculum /viŋ-kyə-ləm/ - 1. a unifying bond : LINK, TIE  2. a straight horizontal mark placed over two or more members of a compound mathematical expression and equivalent to parentheses or brackets about them

I'm pretty sure I've heard of the second definition at some point in my engineering education. But I don't think I've encountered the first before.

loophole /ˈlüp-ˌhōl/ -  1a. a small opening through which small arms may be fired  b. a similar opening to admit light and air or to permit observation 2. a means of escape  especially : an ambiguity or omission in the text through which the intent of a statute, contract, or obligation may be evaded 

These days, everyone has heard of the second definition. I'm thinking I may have encountered the first before, too, but maybe only once, and it definitely threw me for a loop while solving the puzzle.