As with any hobby, Phillumeny (matchcover collectng) has its own body of item names, terms, historical references, and just plain jargon. You'll need to familarize yourself with at least the basics as soon as possible.

3-D - see Lenticular
10-Strike - generic term for covers with 10 matches;
manufactured by Ohio, Match Corp, and Universal; introduced by Universal in 1938. John Williams’s collection numbers 8,000+ [see also Ten-Strike]

12-Strike - generic term for covers with 12 matches; cover is slightly wider than 10-strike covers; produced by Arrow Match Co., Advance Match Co., and Maryland Match Co.; unclear as to whether Arrow or Advance introduced the size. At least 1714 known.

12-Up - Arrow Match Co. trademark for its 12-strike covers; 1940-1950.

20-Strike - generic term for covers with 20 matches or that sized cover; earliest and most common size of matchcover; produced by almost all US manufacturers after 1920. [see also specific trademarks such as Eagle 20, etc.]

21 Feature - Lion trademark for its 21-stick Feature covers; these are 30-stick sized covers; introduced c. 1935.

22 Feature - Lion trademark for its 22-stick Feature covers; these are 30-stick sized covers; introduced c. 1935

30-Strike - generic term for covers with 30 matches or that sized cover; first introduced by Owname in 1935. [see also specific trademarks such as Ambassador, Aristocrat, etc.]

40-Strike - generic term for covers with 40 matches or that sized cover; introduced by Advance Match Co. in 1931. Joe Onofri’s collection numbers 2000+. [see also specific trademarks such as Billboard, Royal Flash, etc.]

100-Strike - generic term for covers with 100 matches. [see also Centurylite]

200-Strike - a cover with 200 match sticks; souvenir-types.

240-Strike - a cover with 240 match sticks; souvenir-types; 1939-?

AA - An infrequently used abbreviation for American Ace [See American Ace]

Abrasive - A previously obsolete term for striker, but it seems to be making something of a comeback with the appearance in recent years of a very granulated-type striker on certain matchboxes, often foreign.

Accumulation - As opposed to collection, refers to an amassed group of covers or boxes which have not been organized into any logical fashion; often used to refer to the holdings of non-collectors.

Ace - Short form of American Ace [See American Ace]

Ace Match Corp. - Defunct match company; Maywood, IL, 1936- dissolved 1957. [I have never actually seen an Ace mm]

Acme Match Corp. - Defunct match company; Duluth, MN (?); originally Acme Match Co.1920s-1931. 6 covers currently listed.

Acme Quality - Acme Match Co. footer (1920s)

Acorn Match Co. - Defunct match company; c. 1920s. 3 covers currently listed.

Action Match - Universal trademark, ca. 1940; characterized by flared edges at the saddle when opened; at least 24 known varieties.

Adams Hats - Sponsor/advertiser for 9 sets and series of 20-strike covers from 1935 to 1948;

 
*Details on the availability of the full glossary are here.