Infra

[in-fruh] /ˈɪn frə/

adverb
1.
below, especially when used in referring to parts of a text.
1.
a prefix meaning “below,” used, with second elements of any origin, in the formation of compound words:
infrasonic; infrared.
[oo t in-frah; English uht in-fruh] /ʊt ˈɪn frɑ; English ʌt ˈɪn frə/
Latin.
1.
as (stated or shown) below: used in a book, text, etc.
[wee-de in-frah; English vahy-dee in-fruh, vee-] /ˈwi dɛ ˈɪn frɑ; English ˈvaɪ di ˈɪn frə, ˈvi-/
Latin.
1.
see below (used especially to refer a reader to parts of a text).
/ˈɪnfrə/
adverb
1.
(esp in textual annotation) below; further on
/ʊt ˈɪnfrɑː/
uknown
1.
as below
prefix
1.
below; beneath; after: infrasonic, infralapsarian
adv.

“under, below, further on,” from Latin infra (see infra-).

word-forming element from Latin infra (adv., prep.) “below, underneath, beneath; later than, smaller, inferior to,” from PIE *ndher “under” (cf. Sanskrit adnah “below,” Old English under “under, among;” see under). Opposed to super-. Its use as a prefix was rare in Latin.

infra- pref.
Inferior to, below, or beneath: infrasonic.