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 (mŏn′əf-thông′, -thŏng′)
1. A single vowel articulated without change in quality throughout the course of a syllable, as the vowel of English bed.
2. Two written vowels representing a single sound, as oa in boat.

[Late Greek monophthongos : Greek mono-, mono- + Greek phthongos, sound.]

mon′oph·thon′gal (-thông′gəl, -thŏng′-) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
In addition, we have found that the pre-oral TRAP vowel is becoming monophthongal in our younger speakers.
There are gaps in the diphthongs: [??-.u] does not occur, and short [ei] and [ou] became monophthongal [e:] and [o:] very early on.
He had seen [empty set] described as a monophthongal closed mid+front rounded vowel.
* The presence of a centralizing falling diphthong [ie] in some of the words, where the other words had a monophthongal long vowel, [[??]:] or [i:], and possibly also [c:].
Vowel nuclei in RP English have alternately been described as short monophthongal vs long monophthongal vs diphthongal (i.e.
The account of PRICE is somewhat inconclusive; Shetland is mentioned but is not claimed to be distinctive in any way, MOUTH is given as [[DELTA][OMEGA]] for Shetland, which also, naturally shares monophthongal [u(:)] with the rest of Scotland and many accents in the North of England.
* e > ie [ie]: miez 'man', mi'ed 'men' * o > no [uo]: suo 'marsh', ku'odi 'direct' * o > uo [uo] > ie: uo > ie 'night', i'ezo 'night (IllSg)' * e > ie [ie]: tiera 'grain; blade', pie'zzo 'to wash' * o > no [uo]: suoda 'war', kuo'd 'home' The breaking of * e, * o, and * e did not occur (a) before a syllable containing a monophthongal * i (ve'rri 'bloody (NSg)', veriz 'bloody (GSg)' from ve'r < * veri; te'b < to'b < * tobi 'epidemic', in contrast to lie 'ggi 'muddy (NSg), liegiz 'muddy (GSg) from lieges 'mud'); (b) in the diphthong * ei (leba < * leiba '(rye) bread', leibo < * leibado 'bread (PSg)', and (c) before a palatal or palatalized consonant (keja 'grindstone', reja 'rake', tedi 'works (PSg)').
This research observed that the native English monophthongal vowels that do not have equivalent values in Shona are substituted with Shona monophthongs that are articulatorily close to them in the spoken English of Shona-English bilinguals.
The chronologically earliest manuscript of the Ormulum is more innovative as it not only preserves monophthongal EH forms but also develops a substantial number of EIH forms, the ratio being 2 (EH) : 1 (EIH).
Milton Keynes youngsters, for example, rejected both London monophthongal [a:] variants of /ai/ as well as those with non-fully open variants (such as [[??]] and [[??]I]) found in the surrounding rural areas.
The original (lost) Visigothic language may have had both diphthongal and monophthongal sounds in opposition to each other in the relevant lexemes, but we do not know how they were spelt in Visigothic manuscripts.