seventh day of the month; seven days
seventh day after a person's death; first seven-day period after a person's death; (arch.) seven days; (arch.) one week
memorial service held on the seventh day following a person's death
second week's memorial services
21st day after death; 21st day after birth
blotchy swell shark (Cephaloscyllium umbratile)
swellshark (Cephaloscyllium ventriosum, species of catshark in the Eastern Pacific)