| AFTERBIRTHS | • afterbirths n. Plural of afterbirth. • AFTERBIRTH n. the placenta and fetal membranes that are expelled after delivery. |
| BIOSTRATIGRAPHY | • biostratigraphy n. (Biology, geology) The study of the stratigraphic distribution of fossils. • BIOSTRATIGRAPHY n. the determination of age, etc., of sedimentary strata from fossils which they contain. |
| BIRTHRATES | • birthrates n. Plural of birthrate. • birth␣rates n. Plural of birth rate. • BIRTHRATE n. the proportion of live births to population. |
| ERYTHORBATES | • erythorbates n. Plural of erythorbate. • ERYTHORBATE n. a salt of erythorbic acid that is used in foods as an antioxidant. |
| ERYTHROBLAST | • erythroblast n. (Cytology) A cell in the bone marrow from which red blood cells develop. • ERYTHROBLAST n. a cell in bone marrow that develops into an erythrocyte. |
| ERYTHROBLASTIC | • erythroblastic adj. Relating to erythroblasts. • ERYTHROBLASTIC adj. of or like an erythroblast. |
| ERYTHROBLASTS | • erythroblasts n. Plural of erythroblast. • ERYTHROBLAST n. a cell in bone marrow that develops into an erythrocyte. |
| HEARTTHROBS | • heartthrobs n. Plural of heartthrob. • HEARTTHROB n. an object of affection. |
| MOUTHBREATHERS | • mouthbreathers n. Plural of mouthbreather. • mouth-breathers n. Plural of mouth-breather an alternative spelling of mouth breather. • mouth␣breathers n. Plural of mouth breather. |
| ORTHOBORATES | • orthoborates n. Plural of orthoborate. • ORTHOBORATE n. a salt of orthoboric acid. |
| REHABILITATORS | • rehabilitators n. Plural of rehabilitator. • REHABILITATOR n. one who rehabilitates. |
| RUBYTHROATS | • rubythroats n. Plural of rubythroat. • RUBYTHROAT n. any of numerous species of humming birds, in which the male has on the throat a brilliant patch of red feathers having metallic reflections. |
| STRAIGHTBRED | • straightbred adj. Produced by breeding from a single breed, variety or species. • straightbred n. Any organism produced by breeding from a single breed, variety, or species. • STRAIGHTBRED n. an animal produced by breeding a single breed, strain, or type. |
| STRAIGHTBREDS | • straightbreds n. Plural of straightbred. • STRAIGHTBRED n. an animal produced by breeding a single breed, strain, or type. |
| SUBSTRATOSPHERE | • substratosphere n. The area of the atmosphere directly below the stratosphere. • SUBSTRATOSPHERE n. the area of the atmosphere below the stratosphere. |
| TETRABRACHS | • TETRABRACH n. in classical prosody, a word or metrical foot composed of four short syllables. |
| THREADBAREST | • threadbarest adj. Superlative form of threadbare: most threadbare. • THREADBARE adj. having the nap worn off so that the thread shows. |