The pearly lustre (in the dry state) owing without doubt to the minute sulci on the backs of the cells.
Lower margin of mouth notched in the middle; back of cell minutely sulcated; sulci short, interrupted, and irregular.
The brain (Fig. 53) is marked by sulci, contrary to what we find in Ornithorhynchus.
Gyrus, jī′rus, n. one of the rounded edges into which the surface of the cerebral hemisphere is divided by the fissures or sulci.
Segments of abdomen irregularly multiannulate, sulci deep and surface usually appearing strongly rugose and uneven.
The sulcus is bifurcate; the fork is near the base and almost gives the appearance of two sulci on some specimens.
This gray substance lies in folds or convolutions, the furrows or sulci, dipping deeply into the interior of the brain.
The lymph was purely basal, solely on the arachnoid, not in the fissures or sulci.
plural sulci, Latin, literally "furrow, trench, ditch, wrinkle."
sulcus sul·cus (sŭl'kəs)
n. pl. sul·ci (-kī, -sī)
Any of the grooves on the brain surface, bounding the gyri; a fissure.
A long narrow groove or depression, as in an organ or a tissue.