Noun

(en noun)

(humorous, nonstandard) A student of ferroequinology; a person who studies trains.

* 1954 , Trains , Kalmbach Pub. Co.

And because you care, you’ve automatically classified yourself as a railfan (alias railroad enthusiast, train-watcher, ferroequinologist ).

* {{quote-newsgroup

, date = 1990-10-19 , author = Bruce Tiffany , title = Re: 'America, a Godless State' and 'Barbaric Theists' merged. , newsgroup = alt.atheism , passage = The fact that automobiles, buildings, clothing, bridges, watches, locomotives (my personal favorite, being a ferroequinologist !), ad infinitum are designed by people has no bearing whatsoever... }}

* {{quote-newsgroup

, date = 1991-11-20 , author = Warren T. Brill , title = Re: what does this mean? , newsgroup = rec.railroad , passage = It's a schnazzy-looking engine, looks a lot like a GP-35, which I believe our ferroequinologist guru Roger Mitchell says it was rebuilt from. }}

* {{quote-newsgroup

, date = 1992-08-08 , author = Doretta Hanschka , title = Re: Outta here for awhile... , newsgroup = bit.listserv.words-l , passage = I'd tell you to take the kids on the mixed train.... It was fun even for a raiload victim like me - ferroequinologist father. }}

Noun

(en noun)

A non-existent or empty value or set of values.

Zero]] quantity of [[expression, expressions; nothing.

(Francis Bacon)

Something that has no force or meaning.

(computing) the ASCII or Unicode character (), represented by a zero value, that indicates no character and is sometimes used as a string terminator.

(computing) the attribute of an entity that has no valid value.

Since no date of birth was entered for the patient, his age is null .

One of the beads in nulled work.

(statistics) null hypothesis