Prefix
A prefix signifying alongside of, beside, beyond, against, amiss; as parable, literally, a placing beside; paradox, that which is contrary to opinion; parachronism.
A prefix denoting: (a) Likeness, similarity, or connection, or that the substance resembles, but is distinct from, that to the name of which it is prefixed; as paraldehyde, paraconine, etc.; also, an isomeric modification. (b) Specifically: (Organ. Chem.) That two groups or radicals substituted in the benzene nucleus are opposite, or in the respective positions 1 and 4; 2 and 5; or 3 and 6, as paraxylene; paroxybenzoic acid. Cf. Ortho-, and Meta-. Also used adjectively.
Source: Webster's dictionaryTerminology for taxa Mono-, para- and polyphyletic taxa can be understood based on the shape of the tree (as done above), as well as based on their character states. Source: Internet
In the modern varieties, it is still usually the case that a morpheme (unit of meaning) is a single syllable; contrast English, with plenty of multi-syllable morphemes, both bound and free, such as "seven", "elephant", "para-" and "-able". Source: Internet
When the faces altered are parallel, we add para- to the name of the operation. Source: Internet