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There are 20 ten-letter words containing SPERM

ANGIOSPERM• angiosperm n. (Botany) Any plant of the clade Angiosperms, characterized by having ovules enclosed in an ovary; a flowering plant.
• ANGIOSPERM n. a plant of the Angiospermae, one of the main divisions of flowering plants, in which the seeds are in a closed ovary, not naked as in gymnosperms.
DISPERMOUS• dispermous adj. (Botany) Having only two seeds.
• DISPERMOUS adj. having two seeds.
ENDOSPERMS• endosperms n. Plural of endosperm.
• ENDOSPERM n. in a seed, nutritive tissue formed from the embryo-sac.
GYMNOSPERM• gymnosperm n. (Botany) Any plant such as a conifer whose seeds are not enclosed in an ovary.
• GYMNOSPERM n. a plant with the ovules borne naked or unprotected, the conifers or cone-bearing plants and their allies.
PANSPERMIA• panspermia n. (Biology) The hypothesis that microorganisms may transmit life from outer space to habitable bodies;…
• PANSPERMIA n. (Greek) the theory that life could be diffused through the universe by means of germs carried by meteorites, also PANSPERMATISM, PANSPERMISM, PANSPERMY.
PANSPERMIC• panspermic adj. (Biology) Relating to panspermy or to panspermia.
• PANSPERMIC adj. of or pertaining to panspermy; as, the panspermic hypothesis.
PERISPERMS• perisperms n. Plural of perisperm.
• PERISPERM n. the albumen of a seed, esp. that portion which is formed outside of the embryo sac.
SPERMACETI• spermaceti n. A wax obtained from the head of sperm whales and used to make cosmetics etc.
• SPERMACETI n. a waxlike substance used in candles, ointments, etc., obtained from oil of sperm-whale, etc., also PARMACITIE.
SPERMADUCT• spermaduct n. A spermatic duct.
• SPERMADUCT n. a duct conveying spermatozoa, also SPERMIDUCT.
SPERMARIES• spermaries n. Plural of spermary.
• SPERMARY n. an organ in which sperm is formed.
SPERMARIUM• SPERMARIUM n. the male germ gland, also SPERMARY.
SPERMATIAL• spermatial adj. Of or relating to the spermatium.
• SPERMATIAL adj. of or like a spermatium, one of the motionless spermatozoids in the conceptacles of certain fungi.
SPERMATICS• spermatics n. Plural of spermatic.
• SPERMATIC n. a spermatic vessel.
SPERMATIDS• spermatids n. Plural of spermatid.
• SPERMATID n. a cell that develops directly into a spermatozoon.
SPERMATIUM• spermatium n. One of the motionless spermatozoids in the conceptacles of certain fungi.
• SPERMATIUM n. one of the motionless spermatozoids in the conceptacles of certain fungi.
SPERMICIDE• spermicide n. A substance used for killing sperm.
• SPERMICIDE n. a substance that kills sperm.
SPERMIDUCT• spermiduct n. Synonym of vas deferens.
• SPERMIDUCT n. a duct conveying spermatozoa, also SPERMADUCT.
SPERMOGONE• SPERMOGONE n. a flask-shaped structure in some fungi, also SPERMOGONIUM.
ZOOSPERMIA• zoospermia n. The presence of live spermatozoa in the semen.
• ZOOSPERMIUM n. one of the spermatic particles; a spermatozoid, also ZOOSPERM.
ZYGOSPERMS• zygosperms n. Plural of zygosperm.
• ZYGOSPERM n. a spore formed by union of two similar cells, also ZYGOSPORE.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the 1Word.ws and WikWik.org.

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