signet ring

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sig·net ring

the early stage of trophozoite development of the malaria parasite in the red blood cell; the parasite cytoplasm stains blue around its circular margin, and the nucleus stains red in Romanowsky stains, whereas the central vacuole is clear, giving the anular appearance.
A term of art referring to a morphology which by microscopy or an imaging modality has an appearance not unlike that of a signet ring
References in periodicals archive ?
It has to be distinguished from mucinous and clear cell carcinomas, signet ring and sclerosing stromal tumors, and metastatic mucinous carcinoid.
For the first stage, the Minister will insert a signet ring into a slot on the laptop.
In Chaucer, Troilus's ruby ring is his signet ring, used by him, as signets usually were in English and Scottish royal households in the Middle Ages, to seal communications of a private nature (OED, s.
Signet rings and fobs worn from watch chains were both originally used for the same purpose: impressing one's personal seal on wax when sealing letters.
The second raid took place the following day in Maltby Close when four signet rings of high sentimental value were stolen.
It is not unusual for Charles to give signet rings or cufflinks bearing his crest to trusted and cherished members of staff.
As reported last month in the Echo, the con-men have been selling men's signet rings and chunky chains engraved with fake hallmarks to unsuspecting members of the public in Cardiff.
Men's signet rings and chunky chains engraved with fake hallmarks are being touted around the streets of Cardiff, Caerphilly and Tredegar for as little as pounds 20 each.
That's because Mr Ali G has been building his massif over in the big old US of A and can now afford even more signet rings from Elizabeth Duke of Argos.