oral groove


Also found in: Medical.

oral groove

[′ȯr·əl ¦grüv]
(invertebrate zoology)
A depressed, groovelike peristome.
Mentioned in ?
References in periodicals archive ?
Paramecia can expose students to many organelles that they wouldn't normally have the opportunity to see, such as oral grooves, food vacuoles, cilia, macronuclei, and, in some cases, trichocysts.
5A) merges into a prominent nerve nodule positioned near the elongate ciliated oral groove present in this species.
Although the superficial mucous string is drawn between the palp lamella at their distal apices, the superficial groove extends the entire length of the inner demibranch, ending at the oral groove between the palp pair.