Crossword puzzle clue "developmental stage"

the entity which develops in a woman's womb until it is born as a baby, esp. up to about eight weeks, after which it is known as a foetus, also EMBRYON

(Latin) an animal in an immature but active state

to carry out in distinct stages or development

the beginning of sexual maturity

to grow old

absorption in imaginative activity directed by the thinker's wishes, with loss of contact with reality