He·La cell 
(hĕlə)
(hĕlə)n.
Any of the cells of the first continuously cultured human carcinoma strain, originally obtained from cancerous cervical tissue and maintained for use in biomedical research.
[From the first two letters of the first and last name of Henrietta Lacks (1920-1951), the American cancer patient from whom the cells were taken in 1951.]
- laugh away
- laugher
- laughing gas
- laughing jackass
- laughingly
- laughingstock
- laugh in one's sleeve
- laugh in sleeve
- laughline
- laugh line
- laugh off
- laugh off (or away)
- laugh out of the other side of mouth
- laugh out of the other side of (one's) mouth
- laugh out of the other side of one's mouth
- laughter
- laugh track
- laugh up/in (one's) sleeve
- laugh up one's sleeve
- laugh up sleeve
- launce
- launch
- launch
- launcher
- launching pad