blastocyst

noun/ˈblæstəsɪst/

Frequency rank: #19,709 most common English word

Meaning

An early-stage embryo consisting of a hollow ball of cells, formed about five days after fertilization.

Illustration for the English word “blastocyst”

Example sentence

After fertilization, the embryo develops into blastocyst before implanting in the uterine wall.

Synonyms & related words

Practice this word in the quiz

More words in ranks 19,701–19,800