Today’s WOTD – 3 September 2012

addendum   

[uh-den-duhm]

noun, plural addenda  [-duh] for 1, 2; addendums for 3.
1. a thing to be added; an addition

(not to be confused with ‘corrigendum’, which is ‘to issue a correction’).

2. an appendix to a book.
3. Machinery .
a. the radial distance between the tip of a gear tooth and the pitch circle of a gear or the pitch line of a rack. Compare dedendum.
b. Also called addendum circle. an imaginary circle touching the tips of the teeth on a gear.

Today’s aphorism

‘It’s a job that’s never started that takes the longest to finish’.

J.R.R. Tolkien

On this day

3 September 1939 – Britain declares war on Germany.

3 September 1970 – death of Alan Wilson. American guitarist and singer-songwriter for Canned Heat. He was 27.