Middle English Dictionary Entry
petrǒus adj.
Entry Info
| Forms | petrǒus adj. Also (Latinate) petrosa, petrosum, petrosi. |
| Etymology | L petrōsus & OF petros. |
Definitions (Senses and Subsenses)
1.
Anat. Of parts of the temporal bones of the skull: very hard and dense; ~ bones, bones ~, the parts of the two temporal bones situated at the base of the skull between the sphenoid and occipital bones, containing the labyrinth of the ear.
Associated quotations
- a1400 Lanfranc (Ashm 1396)110/10 : Þese boonys in oon partie ben ful hard þere as þe hole of þe eere passiþ þoruȝ, & þei ben clepid petrosa.
- ?a1425 *Chauliac(1) (NY 12)10b/b : Þe 5 & þe 6 bonez bene seid petrosa for þai bene hard.
- ?a1425 *Chauliac(1) (NY 12)11a/a : William & Lamfranc & Henri..sey also þe bonez petrosa [Ch.(2): stony boones; L ossa petrosa] for to be added aboue þe bones parietalia & noȝt toching þe brayne ne for to be of þe principalz of which þe oppositee..is trewe.
- ?a1425 *Chauliac(1) (NY 12)12a/a : Þe erez bene cartilaginous & amfractuous, i. crokyng, aboue þe bone petrosum [Ch.(2): stony bone; L os petrosum] ordeynd for to here.
- ?a1425 *Chauliac(1) (NY 12)12a/b : Þer bene 2 ossa paris or of þe templez þe which..produceþ a maner addicioun toward þe addicioun of þe bone petrosi.
- ?a1425 *Chauliac(3) (Htrn 95)46a/a : Be cause of more alteracioun of Eire, þo bones þat ben cleped petrosa ben added to in þat place þat þe eire þat passeþ þurȝ hem to þe braine mowe ben degraded in manye maners.
- c1475(1392) *MS Wel.564 (Wel 564)19a/a : Þer beþ in þe heed but iiij principal bonys, þat is to seie, þe Coronal and þe two verual bonys & lauda and oþere two þat beþ not principallis as þe petrouse bonys.
- c1475(1392) *MS Wel.564 (Wel 564)19b/b : Þou schalt vndirstonde þat þe addicioun of þese petrouse or mendouse bonys is for iiij vtilitees.
- c1475(1392) *MS Wel.564 (Wel 564)20a/a : Þe substaunce of þe brayn lijþ riȝt nyȝ þat same place where þe verual bonys ben moost feble..And þerfore to þe more alteracoun of þe eir þe petrous bonys ben addid to hem.
- c1475(1392) *MS Wel.564 (Wel 564)27b/b : The tweyne abouen ben ioyned faste in þe middil of þe Orbita..And in her hyndere extremitees..þei ben ioyned wiþ þe petrous bonys.
Supplemental Materials (draft)
Note: Med., etc., see further J.Norri, Dictionary of Medical Vocabulary, s.v. bone petrosum.
Supplemental Materials (draft)
Note: Med., etc., see further J.Norri, Dictionary of Medical Vocabulary, s.v. petrous bone.