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1660s, "body fluid," from Latin latex (genitive laticis) "liquid, fluid," probably from Greek latax "dregs," from PIE root *lat- "wet" (cf. Middle Irish laith "beer," Welsh llaid "mud, mire," Lithuanian latakas "pool, puddle," Old Norse leþja "filth"). Used 1835 to mean "milky liquid from plants." Meaning "water-dispersed polymer particles" (used in rubber goods, paints, etc.) is from 1937. As an adjective by 1954, in place of clasically correct laticiferous.
latex la·tex (lā'těks')
The colorless or milky sap of certain plants, such as the poinsettia, that coagulates on exposure to air.
An emulsion of rubber or plastic globules in water, used in adhesives and synthetic rubber products.
language, text, tool
(Lamport TeX) Leslie Lamport firstname.lastname@example.org's document preparation system built on top of TeX. LaTeX was developed at SRI International's Computer Science Laboratory and was built to resemble Scribe.
LaTeX adds commands to simplify typesetting and lets the user concentrate on the structure of the text rather than on formatting commands.
BibTeX is a LaTeX package for bibliographic citations.
Lamport's LaTeX book has an exemplary index listing every symbol, concept and example in the book. The index in the, now obsolete, first edition includes (on page 221) the mysterious entry "Gilkerson, Ellen, 221". The second edition (1994) has an entry for "infinite loop" instead.
["LaTeX, A Document Preparation System", Leslie Lamport, A-W 1986, ISBN 0-201-15790-X (first edition, now obsolete)].