Circumferential canal see ring canal

circumfilum n.; pl. circumfila [L. circum, around; filum, thread] (ARTHRO: Insecta) In dipteran Cecidomyid, anten-nal joints bearing elaborately looped or wreathed, thin-walled chemoreceptors with pores lying among fine surface ridges.

circumflex a. [L. circum, around; flexibilis, bendable] Bent or winding, esp. blood vessels or nerves.

circumgenital a. [L. circum, around; gignere, to beget] 1. Surrounding the genital pore. 2. (ARTHRO: Insecta) In scale insects, groups of small circular glands with an excretory orifice at the tip, surrounding the genital pore.

circumocular a. [L. circum, around; oculus, eye] Around or surrounding the eye.

circumocular sulcus (ARTHRO: Insecta) A commonly occurring groove that strengthens the rim of the eye; may develop into a deep flange protecting the inner side of the eye.

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