English abbreviation · Crochet
What does shell mean in crochet?
shell means shell — 5 dc in the same stitch.
In French: coquille — 5 brides dans la même maille
Try it with a row from your pattern
Here is a row that uses it. Replace it with a row from your pattern: every abbreviation the reader knows is underlined, and its meaning shows on hover.
Row 2: ch 1, sc in first st, *sk 2 sts, shell in next st, sk 2 sts, sc in next st; rep from * across.