subdialectn.

1642 J. Howell Instr. Forreine Travell x. 124 The French have three dialects, the Wallon..the Provensall, (whereof the Gascon is a subdialect) and the speech of Languedoc.

1737 M. Shelton in tr. W. Wotton Short View Hickes's Anc. Northern-lang. (ed. 2) 128/2 (note) As to the Teutonic..it is one of the most spacious maternal Tongues of Europe, and tho' she hath many Dialects and Sub-Dialects, she remains a strong sinewy Language.

1743 Descr. Holland vi. 263 As the Saxon was only a Dialect of the German, so the English was no more than a Sub-dialect of the Saxon.

1845 Proc. Philol. Soc. 2 171 With respect to the languages of Southern India not related to Sanscrit, the Tamul, of which the others are only sub-dialects, presents no direct analogy.

1875 W. D. Whitney Life & Growth Lang. xii. 245 The variety of sub-dialects, especially of the Lesghian, is very great.

1906 G. A. Grierson Ling. Surv. India IV. 167 There is only one sub-dialect of Kūrkū, the so-called Muwāsī... It does not differ much from ordinary Kūrkū.

1958 Amer. Dial. Soc. 30 5 In Map 2 appear isoglosses illustrating this important subdialect split.

1992 Amer. Speech 67 68 It is probably safe to conclude that South Midland is more properly a sub-dialect of Southern speech than of Midland speech.

1911 Amer. Jrnl. Philol. 32 83 Subdialectal differences may indeed have existed in the various Ionic cities.

1960 Amer. Speech 35 218 Least likely to be widely accepted is Hoenigswald's general theory as to the origin of sound change... He revives the old substratum theory in a subdialectal setting.

1978 Language 54 10 The pattern of free variation (presumably representing subdialectal variation).

2006 E. S. Burch Social Life in Northwest Alaska iv. 215 The terminology is further complicated by dialectal and subdialectal differences.