The Collaborative International Dictionary
Megaceros \Me*gac"e*ros\ (m[-e]*g[a^]s"[-e]*r[o^]s), n. [NL., fr. Gr. me`gas great + ke`ras horn.] (Paleon.) The Irish elk.
Wiktionary
n. (context paleontology English) The Irish elk.
Wikipedia
Megaceros is a genus of hornworts in the family Dendrocerotaceae. The genus is found in the Old World tropics of east Asia and Australia. Its name means 'big horn', and refers both to the exceptionally large size of the gametophyte thallus and to the large, horn-shaped sporophyte that the plants produce. Many species have a branching thallus that is more than two centimeters wide. The gametophytes are monoicous.
The genus Megaceros is unusual among hornworts in that the sporophyte does not have stomata, and the spores are green because they contain chloroplasts, as does the related genus Dendroceros. The thallus cells often contain more than one chloroplast, as opposed to other hornwort genera. The elaters are helical.
The genus Megaceros was first recognized in 1907 by D. Campbell. More recently, the genera Nothoceros and Phaeomegaceros have been split off from this genus. The former genus includes all New World species previously included in Megaceros.
Usage examples of "megaceros".
It was made from the stomach of a giant deer, a megaceros, which had been cured to maintain its naturally watertight character.
In the warmer seasons, bison, aurochs, and every variety of deer, from the giant megaceros to small shy roe deer, were numerous, but only reindeer stayed on in winter.
Both species preferred yindy, dry land, but the rhinos liked grass and sedge, and true to the goatlike creatures they were, browsed on wood- Large reindeer and the gigantic megaceroses with massive i shared the frozen land, and horses with thick winter coats, e was one animal that stood out among the populations in f the upper course of the Great Mother River, it was mam rer grew tired of watching the huge beasts.