peristomialadj.
/ˌpɛrᵻˈstəʊmɪəl/, U.S. /ˌpɛrəˈstoʊmiəl/ 1. Botany. Of or relating to the peristome of a moss.
ΚΠ
1856 W. S. Sullivant in Rep. Explor. Route Mississippi River to Pacific Ocean. IV: Bot. Rep. (Rep. Explor. & Surv. Route Railroad to Pacific, U.S. War Dept.) v. 185 About the size of F. bryoides, from which it is distinguished by its cernuous capsule, the deep insertion of its peristomial teeth, [etc.].
1881 Jrnl. Bot., Brit. & Foreign 19 18 Recklessly bandied about among peristomial genera.
1941 Bull. Torrey Bot. Club 68 571 The walls upon which deposition takes place to form the peristome teeth are the ones between the outer and inner peristomial layers.
1997 Internat. Jrnl. Plant Sci. 158 489 The remains of a peristomial membrane are present around the rim of the capsule after the operculum has dehisced.
2. Zoology. Of or relating to the peristome of an invertebrate; surrounding the mouth, circumoral; = peristomal adj.1
ΘΚΠ
the world > animals > animal body > general parts > head and neck > [adjective] > surrounding the mouth
peristomal1848
peristomial1870
1870 H. A. Nicholson Man. Zool. I. xiii. 99 Between the mouth and the circumference of the disc is a flat space, without appendages of any kind, termed the ‘peristomial space’.
1896 Cambr. Nat. Hist. II. 313 There are four long peristomial cirri on each side.
1950 R. W. Miner Field Bk. Seashore Life i. 18 The peristomial groove extends from the anterior end to the middle of the body with undulating membranes on the edges.
2001 Invertebr. Biol. 120 178 The presence of ferritin inside the amebocytes indicates that these cells migrated from the perivisceral coelom to the peristomial connective tissue.
This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).
<
adj.1856