ELYTROID
El"y*troid, a. Etym: [Gr. -oid.] (Zoöl.)

Defn: Resembling a beetle's wing case.

ELYTRON; ELYTRUM El"y*tron, El"y*trum (-tr n.; pl. Elytra. Etym: [NL., fr. Gr. (Zoöl.) (a) One of the anterior pair of wings in the Coleoptera and some other insects, when they are thick and serve only as a protection for the posterior pair. See Coleoptera. (b) One of the shieldlike dorsal scales of certain annelids. See Chætopoda.

ELZEVIR
El"ze*vir, a. (Bibliog.)

Defn: Applied to books or editions (esp. of the Greek New Testament and the classics) printed and published by the Elzevir family at Amsterdam, Leyden, etc., from about 1592 to 1680; also, applied to a round open type introduced by them. The Elzevir editions are valued for their neatness, and the elegant small types used. Brande & C.

'EM
'Em.

Defn: An obsolete or colloquial contraction of the old form hem, them. Addison.

EM
Em, n. (Print.)

Defn: The portion of a line formerly occupied by the letter m, then a square type, used as a unit by which to measure the amount of printed matter on a page; the square of the body of a type.

EM-
Em-.