Answer: striae

AnswerCrossword Clue
STRIAEMinute grooves
striaeflute on the shaft of a column
striaeany of a series of parallel lines or tiny grooves on the surface of a crystal, indicative of the mode of growth
striaeSTRIA, a thin groove, stripe or streak
striaeslight or narrow furrow, ridge, stripe, or streak, esp. one of a number in parallel arrangement
STRIAENarrow channels
STRIAEParallel grooves
STRIAEStretch marks, e.g.
STRIAEMicrogrooves
STRIAELines
STRIAETiny grooves
STRIAEThey're groovy
STRIAESlight furrows.
STRIAESmall grooves.
STRIAENarrow grooves.
STRIAEGrooves or channels.
STRIAEFine grooves
STRIAENarrow furrows
STRIAEMuscle fiber ridges
STRIAENarrow grooves
STRIAEStretch marks, for example (sorry, tough grid)