Paramaecium (sometimes typeset as Paramęcium) was an Australian death/doom metal band formed in 1991. There is use of instrumentation like flutes, cellos and violins on some albums. Paramaecium is one of the few doom metal bands that focus on Christian lyrical themes and Christian concepts. According to Doom-metal.com, "what sets Paramaecium apart from other bands in the doom metal scene, is the fact that they are the only Christian death/doom band that made it to the top of the genre."

They have released 4 full length albums, one EP, and even a novel from the bassist/vocalist Andrew Tompkins.

In 1993 Paramaecium released their debut album, Exhumed of the Earth which has become a landmark in the death/doom genre. The band consisted of Andrew Tompkins on vocals and bass, Jason De Ron on guitar, and Jayson Sherlock on drums. The music was inspired by Cathedral, early My Dying Bride and Anathema. The band incorporated flute and violin sounds as well as a soprano alongside the usual musical offerings of death and doom metal.

Paramaecium added rhythm guitarist Chris Burton in 1995 and released their second album, Within the Ancient Forest, which was accompanied by a fantasy novel of the same name written by Tompkins. The album was more diverse and technical, and involved female vocalists, harpsichord, piano, flute and cello. The third album, A Time to Mourn, was released in 1999 and marked the departure of all previous band members except Tompkins. The band no longer had a touring lineup, so guest musicians were used, including guitarist Ian Arkley (formerly of Seventh Angel, Ashen Mortality and My Silent Wake).

The consistently b'flat tuned guitars (Except they sound like they are tuned to a b' on "A Time to Mourn") have an equal balanced rhythm section of power chords and single notes. The guitars are very crunchy, and haunting.
There are also female vocals throughout the 3 albums, all done by different ladies. Among the other instruments, there are also violins, cellos, a harpsichord, a flute, and other various strings. The most dominate of the secondary instruments throughout the trilogy is the violin.

After a five year break, Paramaecium returned in 2004 with Echoes from the Ground. The album again featured Tompkins as the only original member, but held firmly to the band's doom and death metal roots while again incorporating soprano and violins.

In 2005 Tompkins started working again with guitarist De Ron on songs for a new album. Early in 2006, drummer Sherlock rejoined the band and they played a series of concerts in Melbourne and Sydney, Australia, and NordicFest in Oslo, Norway. The NordicFest appearance in November 2006 marked the official end of Paramaecium, but it was also the official launch of the band under its new name, InExordium.