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spell out to describe or explain in detail, so as to make unmistakably clear. [2 definitions]
spelt1 a past tense and past participle of spell1.
spelt2 a hardy wheat grown in Europe and western Asia and used esp. for livestock feed.
spelunk to explore or investigate caves.
spelunker one who explores caves as a hobby or studies them as a profession.
spend to disburse (money or other resources). [4 definitions]
spendable available to be spent.
spender one who spends, esp. one known to spend large sums of money.
spending the money spent by an individual or organization, or the manner in which it is spent.
spending money cash for small personal expenses.
spendthrift one who is extravagant or wasteful with money; squanderer. [2 definitions]
spent past tense and past participle of spend. [3 definitions]
-sperm seed.
sperm1 a male animal's reproductive cell; spermatozoon. [2 definitions]
sperm2 a white waxy solid obtained from the oil of the sperm whale's head, and used in cosmetics, ointments, and candles; spermaceti. [2 definitions]
spermaceti a white waxy substance obtained from oil in the head of a sperm whale, used in candles, cosmetics, and ointments.
-spermal see -spermous.
spermatic of, pertaining to, or like sperm or sperm cells; seminal. [2 definitions]
spermato- seed; sperm.
spermatophore a compact mass of spermatozoa produced by males of certain animal species, such as salamanders and arthropods, that is transferred to the female during mating.
spermatophyte any plant that bears seeds.