| BLASTODERMS | • blastoderms n. Plural of blastoderm. • BLASTODERM n. the germinal membrane in an ovum, from which the embryo is developed. |
| CHORDAMESODERMS | • CHORDAMESODERM n. the layer of specialized cells in the middle of a developing embryo which forms the notochord and structures of the central nervous system. |
| ECHINODERMS | • echinoderms n. Plural of echinoderm. • ECHINODERM n. one of the Echinodermata, starfishes, sand dollars, sea urchins, and sea cucumbers. |
| ECTODERMS | • ectoderms n. Plural of ectoderm. • ECTODERM n. the external layer of an embryo, also EXODERM. |
| ENDODERMS | • endoderms n. Plural of endoderm. • ENDODERM n. the innermost layer of embryo, also ENTODERM. |
| ENTODERMS | • entoderms n. Plural of entoderm. • ENTODERM n. the innermost layer of embryo, also ENDODERM. |
| EXODERMS | • exoderms n. Plural of exoderm. • EXODERM n. the external layer of an embryo, also ECTODERM, EPIBLAST. |
| HYPODERMS | • hypoderms n. Plural of hypoderm. • HYPODERM n. the tissue next under the epidermis, also HYPODERMIS. |
| MESODERMS | • mesoderms n. Plural of mesoderm. • MESODERM n. the middle germ layer of an embryo. |
| OSTEODERMS | • osteoderms n. Plural of osteoderm. • OSTEODERM n. a bony dermal plate. |
| OSTRACODERMS | • ostracoderms n. Plural of ostracoderm. • OSTRACODERM n. any of the early fossil jawless fishes of the Lower Paleozoic usually having a bony covering of plates or scales. |
| PHELLODERMS | • phelloderms n. Plural of phelloderm. • PHELLODERM n. a layer of green parenchymatous cells formed on the inner side of the phellogen, the tissue of young cells which produces cork cells. |
| PLACODERMS | • placoderms n. Plural of placoderm. • PLACODERM n. a fish covered with bony scales. |
| PROTODERMS | • protoderms n. Plural of protoderm. • PROTODERM n. the dermatogen, the nascent epidermis, or external cuticle of plants in a forming condition. |
| SCLERODERMS | • scleroderms n. Plural of scleroderm. • SCLERODERM n. one of a tribe of plectognath fishes having the skin covered with hard scales, or plates, as the cowfish and the trunkfish. |